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[[quoteright:350:[[ComicBook/{{Galactus}} http://static.tvtropes.org/pmwiki/pub/images/56_g_1948.jpg]]]]
[[caption-width-right:350: [[HumansAreMorons Apparently, a gigantic man in a purple suit and an oversized horned helmet is the most complicated form humanity can grasp.]]]]

->''"Words describing it fail. Pages relating it shrivel. Tales recounting it end."''
-->-- '''[[http://magiccards.info/arb/en/28.html Nemesis of Reason]] flavour text''', ''TabletopGame/MagicTheGathering''

Imagine if some non-human entity, such as, let's say, Wiki/TVTropes, became a three-dimensional living entity with self-awareness and consciousness, that wanted to sit down and have a lovely little chat. What would it look like? Like a [[MoeAnthropomorphism surprisingly feminine, charming little sprite]] named JustForFun/TropeTan? [[MatrixRainingCode Walls and walls of binary code that resolve themselves into a house-like shape?]] Or perhaps a whole universe, a world, complete in and of itself?

At some point in the conversation, the personification of TV Tropes drops a little MindScrew in your tea: [[TheTreacheryOfImages you are not looking at, or conversing with, all that TV Tropes is]]. You are not even seeing an [[{{Glamour}} illusion that TV Tropes is projecting into your mind]]. Rather, the sheer [[SugarWiki awesomeness]] of TV Tropes, the [[TheContributors might]] and [[DarthWiki immense hideousness of it]], or [[TVTropesWillRuinYourLife its life-ruining influence]] bypass your eyes and occipital lobe entirely, and your mind meekly registers it as the closest, safest, yet still comparable thing on hand.[[note]]For safety's sake, just say TheWikiWitchOfTheWeb put a spell on you[[/note]] You Cannot Grasp The True Form, or else you will GoMadFromTheRevelation. May overlap with BrownNote.

A practical application of NothingIsScarier. Related to TheseAreThingsManWasNotMeantToKnow, and sometimes AlienGeometries. Often a property possessed by the EldritchAbomination. If everyone who fails to grasp the True Form sees something different, it's an example of AppearanceIsInTheEyeOfTheBeholder.

When someone is in a truly outlandish environment, their brain will just make up stuff for them to see. Usually an excuse for the artist not to have to draw the weird other-dimensional stuff.

[[TruthInTelevision More possible in real life than you may think]], just be prepared before clicking the real life folder open, [[MindScrew you may leave with a headache.]]

See also AFormYouAreComfortableWith, UltimateEvil, HyperspaceIsAScaryPlace, and WeirdnessCensor. Not to be confused with YouCantGetYeFlask.



[[folder:Anime & Manga]]
* In ''Anime/PrincessTutu'', anybody who isn't directly connected to the story sees the eponymous MagicalGirl as a giant white swan wearing a crown.
* ''Manga/DeathNote'''s 13th volume, [[AllThereInTheManual How To Read]], mentions that the true form of the {{Shinigami}} King is unknown and may be incomprehensible to humans.
* ''LightNovel/{{Baccano}}'''s [[spoiler:Ronnie Schiatto]] reveals his [[EldritchAbomination true form]] in the light novels once. No physical description is given, however, on the basis that the sight was so terrifying and incomprehensible that it was blocked immediately and entirely from the spectator's memory.
* Implied regarding goddesses and demons ''Manga/AhMyGoddess''; because they exist in a twelve-dimensional state naturally, four-dimensional beings such as humans cannot truly perceive them. This was most openly stated in chapter 268 where a demon purposefully forced Keiichi to witness a bit of her true form and nearly shattered his mind.
-->'''Mokkurkalfi''': You don't perceive our true appearance. Your existence and ours are different. My form, and what you think you are seeing, are not necessarily the same.
* Several characters in ''LightNovel/ACertainMagicalIndex'' have "unexplainable" abilities. Ollerus (a ridiculously powerful sorcerer) and Gunha Sogiita (Level 5 esper) are a couple... Gunha doesn't even know how his own abilities work (he thought he figured it out at one point, but was told that he was wrong). This is actually a great boon to these characters, as if your opponent doesn't understand what they're being attacked with, they cannot form an effective defense against it.
** The enigmatic being Aiwass. When Accelerator gets his ass kicked by it, Accelerator has a difficult time comprehending what his foe ''was''.
** A Majin wields power that very few can understand. When Othinus (a true Majin) and Ollerus (a "failed" Majin) have a brief battle, bystanders can tell that ''something'' happened between them, but they cannot explain what.
* In Creator/JunjiIto's ''My Dear Ancestors'', the protagonist is so traumatised by the sight of [[spoiler:the antagonist's father (and later, the antagonist) connected to the scalps of each of his ancestors like a centipede]] that she loses her memory. ''Twice''.
* In ''LightNovel/TheCircumstancesLeadingToWaltrautesMarriage'', Freyja in her full glory cannot be properly seen by mortals and is perceived as an intensely bright light. She has to power down to communicate with Jack.
* In ''Anime/DragonBallZBattleOfGods'', Beerus and Whis' ''ki'' is so alien that it cannot be perceived by non-divine beings. After Goku and Vegeta unlock the Super Saiyan God transformation, it's suggested that they are slowly learning how to sense it, even when not in god-form themselves.
** Additionally whenever Goku and Vegeta transform into Super Saiyan Blue during ''Anime/DragonBallSuper'' their ki becomes undetectable to all other Z-Fighters. Their ki suddenly disappearing is repeatedly used as an indication that they're fighting somewhere as Blue and something must be up.

[[folder:Comic Books]]
* It's often said that [[MarvelUniverse Galactus]] doesn't actually look like a gigantic human - it's just your ''brain'' that makes him seem that way...
** Turns out he was a HumanAlien in the previous universe before he became ComicBook/{{Galactus}}, but now his true-form resembles a star.
** To ComicBook/BetaRayBill's people, he looks like a giant amoeba. Interestingly enough, Bill himself sees him like Earthlings do.
** In [[http://3.bp.blogspot.com/-dKAQx_URcKQ/Te0TbZ9aA2I/AAAAAAAAHrs/TDiy2dnMtfA/s1600/John_Byrne_Galactus_POV.jpg one instance]] when Galactus appears before a large number of species, the page is filled with numerous smaller pictures showing how each species perceives him. Some of them do look pretty horrifying.
* In the ''ComicBook/JLAAvengers'' crossover: after flying into space, {{Superman}} and ComicBook/IronMan see the forcible merger of their worlds as two gigantic hands pushing the two Earths together. Tony comments that this can't be real, and Clark says that this is simply how their minds chose to represent the event. Also in this crossover, we see Eternity (the AnthropomorphicPersonification of the Franchise/MarvelUniverse) merging with his female counterpart, Kismet of the Franchise/DCUniverse, [[http://www.comicvine.com/forums/gen-discussion/1/a-dc-equal-for-eternity/688456/ in what looks like a, uh, very intimate embrace.]]
** Left behind in the space where the "merger" took place is an egg that will explicitly become the center of a new universe someday. Make of this what you will. (At any rate, it certainly gives Big Bang [[DoubleEntendre a whole new meaning]].)
* In an early JusticeLeagueOfAmerica comic, the JLA encountered a monster calling itself [[ExactlyWhatItSaysOnTheTin The Unimaginable]], a creature so far beyond human comprehension that it was effectively ''invisible''.
* Toyed with in the tale of Orpheus in the ''[[ComicBook/TheSandman Sandman]] Special'', reprinted in ''Fables And Reflections.'' Orpheus visits Death and becomes confused and disoriented when he sees her in her [[PerkyGoth house clothes]] (i.e. her usual 80's-90's look). She quickly [[AFormYouAreComfortableWith cleans up for her visitor]] (though it's more of a 18th-19th century dress than the black Greek toga she was seen in earlier in the story).
* Due to miscommunication at DC, the death of the ComicBook/NewGods in ''The Death Of The New Gods'' were completely contradicted by the death of the New Gods in ''ComicBook/CountdownToFinalCrisis''. Creator/GrantMorrison [[WordOfGod says]] they ''both'' happened, and are merely different mortal viewpoints of an event completely beyond our grasp.
* In ''ComicBook/PS238'' #35, a JourneyToTheCenterOfTheMind, the Lords of [[OrderVersusChaos Order and Chaos]] appear at the start to explain that much of what we're seeing is a metaphor that we can make sense of, starting with themselves.
-->'''Order''': What that means is that I'm ''not'' really a pleasingly-shaped metallic object that can talk.*
--->'''Footnote''': *The purest form of order found on Earth is usually in the form of math problems where you have to show your work.
-->'''Chaos''': And my true form isn't a jumble of random threads of what appears to be string.**
--->'''Footnote''': It's really entropy, which can look like string. However, [[{{Metaphorgotten}} it's very difficult to tie anything together with it]]. Chaos itself is usually found in junk drawers and the bottom of closets.
* In the {{Superman}} story ''ComicBook/WhateverHappenedToTheManOfTomorrow'', ComicBook/LoisLane tries to tell what Mr. Mxyzptlk's true fifth-dimensional form was: "I can’t describe what Mxyzptlk then became. He had height, width, depth, and a couple of other things, too.”
* ''Comicbook/DoctorStrange''. The Vishanti, a trio of higher entities who sponsor the office of Sorcerer Supreme, explicitly state that they cannot show their true forms to mortals because it would [[GoMadFromTheRevelation wreck their minds]].
* In ''ComicBook/GuardiansOfTheGalaxy'', it's explained that forces and entities, like the Abstracts, sometimes simplify themselves for mortals in order to get their assistance. In the some issue, it's revealed that the setting, what looks like a giant checkerboard-like world, was actually the cloak of a gigantic Abstract.
* ''[[ComicBook/ConanTheBarbarian Conan the Slayer]]'' had the main protagonist and his companions encountering a trio of monstrous brothers whose physical appearance varied from each person's point of view. To Conan, they looked like normal humans of unusual size while one companion saw them as troll-like creatures, another one as tentacled humanoid beings resembling Davy Jones and a third one viewed them as demonic skeletons on fire.

[[folder:Fan Works]]
* Many ''Manga/{{Naruto}}'' fanfics depict the natural forms of the Tailed Beasts as unbearably horrific and mind-numbing to humans.
* ''Fanfic/ThousandShinji'':
** The ''[[TabletopGame/{{Warhammer 40000}} Chaos Gods]]'' have horrible forms that are beyond human understanding.
** Their sucessors [[spoiler:-Shinji, Asuka, Rei and Misato-]] wear thousand forms each, and only a few of them are understandable to human beings. Usually they wear human shapes when they interact with people (their public relationships faces, so to speak).
* In ''FanFic/HarryPotterAndTheMethodsOfRationality'', Dementors are this... unless your conscious mind can solve the riddle they represent, in which case you ''do'' see the true form.
* In the ''FanFic/PonyPOVSeries''
** The Elders of the Alicorns and Draconnequi are {{Eldritch Abomination}}s (though the Alicorns are benevolent), and as such cannot be properly viewed by mortals. This is best exemplified when [[spoiler:Liarjack]] meets the Father of Alicorns -- the only thing she's able to view him as is a piece of the Night Sky in the shape of a pony (probably due to him being the AnthropomorphicPersonification of ''existence''). Everything else about him is so seemingly contradictory (such as appearing as a foal, a colt, and a stallion ''all at once''), she's incapable of understanding it, and finally just gives up trying to in frustration.
** The [[EldritchAbomination Outer Concepts]] all seem to have this to varying degrees. Some of them do carry the 'induce insanity' part, but most of the time it's simply impossible for a mortal to get more of an abstract idea of what they really look like, even when using an Avatar. Their Elder, Azerhorse, is implied to be constantly changing physical form.
** It's implied this applies to some degree to ''all'' of the Concepts, as when [[spoiler:Cadenza]] and Strife appear in their true forms to Moochick and Heathspike, they're both seen as a member of their respective races that represent their Concepts, and Luna implies this is the case whenever the Concepts manifest in their true forms to mortals.
* In ''FanFic/SonicXDarkChaos'', trying to comprehend the true form of [[EldritchAbomination Dark Tails]] is a [[GoMadFromTheRevelation very]], ''[[MindRape very]]'' bad idea. Maledict - who happens to be the biblical {{Satan}} and an immortal PhysicalGod - is literally left ''stunned with terror'' after he sees it.
* The FanFic/BoundDestiniesTrilogy: Both times Din, Nayru, and Farore make actual appearances, they use [[AFormYouAreComfortableWith human forms]], explaining that their true forms are beyond mortal comprehension.
* [[http://fav.me/d9xldet This comic]] has Poindexter, upon learning Discord's normal form is AFormYouAreComfortableWith, asks to see his true form despite Discord's warnings. He ''really'' should have listened.

* In ''Film/{{Dogma}}'', God manifests twice in AFormYouAreComfortableWith (most famously as [[DivineRaceLift Alanis Morissette]]), but His/Her voice is a perfect example. Humans' heads and chests explode upon hearing it because we do not have the aural capacity to handle its awesome power, which is why God usually sends an Angel to communicate with humans.
-->'''The Metatron:''' We went through five Adams before we figured that one out.
* No one knows what the true (or original, if you prefer) form of ''Film/TheThing1982'' is. Not in Creator/JohnCarpenter's version, anyway.
** This is one of those subjects that "one could go crazy thinking about" as Carpenter put it in the DVD commentary. And it remains debated by the fans.
* ''Film/AScannerDarkly'', the [[{{rotoscoping}} rotoscope]] animated film based on the Creator/PhilipKDick story, had an interesting take on this.
* ''Film/TheMothmanProphecies''
-->'''John:''' I think we can assume that these entities are more advanced than us. Why don't they just come right out and tell us what's on their minds?
-->'''Leek:''' ''You're'' more advanced than a cockroach. Have you ever tried explaining yourself to one of them?
* It is said in the ''Film/{{Devil}}'' that the devil can take on any form and gender.
* Sauna in the movie ''Film/{{Sauna}}'' appears to humans as sauna, while it really is something more. This is most likely because it chooses to appear in a form that people can comprehend.
* Merlin in ''Film/{{Excalibur}}'' describes the Dragon, the source of his magic, as "a beast of such power that if you were to see it whole and all complete in a single glance, it would burn you to cinders."

* [[DiscussedTrope Discussed]] in ''Literature/{{Flatland}}'', whose protagonists are two-dimensional polygons for whom the very notion of three-dimensional creatures inspires {{Cosmic Horror Stor|y}}ies. When a Flatlander is [[PalsWithJesus befriended by a]] 3-dimensional sphere, he literally Cannot Grasp The True Form without touching it. A cube looks like an EldritchAbomination, constantly changing shape at various angles.
* The angels in ''Literature/HisDarkMaterials'' are described as being like this - humans and even witches see them as human shaped, being incapable of perceiving their true form which is more like architecture. Baruch and Balthamos may be the exception; they really do seem like see-through humans.
* The [[EldritchAbomination monster]] Literature/{{It}} from Creator/StephenKing's book of the same name. The closest approximation for its physical form that the protagonists could comprehend was a [[spoiler:GiantSpider]]; anyone who sees Its true form of [[LightIsNotGood the deadlights]] will be [[GoMadFromTheRevelation driven insane]] at the very least.
** This also happened with the eponymous character of Stephen King's novel ''Literature/RoseMadder,'' whose true form was something like a spider... thing. Rosie was warned several times not to look at it.
** Happens AGAIN in the Lovecraft-inspired ''Crouch End'', where the woman telling the story to the police recounts how her husband saw ''something'' in a pit in Crouch End, she was only able to glance it but he saw the whole thing, and his mind immediatly blanked it out and caused him to regress mentally.
** This is the whole plot of ''FromABuick8'', with the Buick not really being a car, or even anything remotely resembling one; it simply looks like one to our senses. It might be described as a gate to another dimension, but it probably isn't that either, not fully or exactly. One of the main characters actually compares it to the breathing apparatus on a scuba tank.
* This is a regular feature on ''Literature/{{Discworld}}'', particularly as it relates to death (and indeed [[AnthropomorphicPersonification Death]]!) It's also how the TimeTravel antics of the Men in Saffron appear to civilians.
--> "Time has stopped for everyone but you," said Sweeper patiently. "Actually that sentence is [[LiesToChildren wrong in every particular, but it's quite a useful lie]]."
** Death gets this whenever he interacts with [[{{Muggles}} humans]], who seem confused because ''someone'' is talking to them, and it appears to be a skeleton in a cloak, [[WeirdnessCensor but that's ridiculous, so the mind just rejects it]]. Children, however, aren't nearly as mentally fixed, so their minds easily wrap around it and they see him as he really is.\\
There are rare occasions when Death CAN be seen, such as in ''Discworld/{{Wyrd Sisters}}'', when Death decides to take the place of an actor who is supposed to play him in a ''Theatre/{{Macbeth}}'' expy. Everyone in the audience is expecting to see Death and, therefore, does. Death, not being used to such a large audience, gets stage fright. It is hilarious.
** Non-magic users, not having octagons in their eyes in addition to rods and cones, cannot see octarine, the eighth colour; instead, they only see blackness.
* Mostly averted in Creator/HPLovecraft's works as his {{Eldritch Abomination}}s tend to appear in their true form, which tends to lead to madness in those who see them. Sometimes it's played straight, though:
** Yog-Sothoth is perceived by mortals as congeries of iridescent spheres because his true body transcends the space-time continuum and we only see the small parts of it that happen to intersect with that particular location in time and space.
** Nyarlathotep tends to appear in a form of a man because it makes [[{{Chessmaster}} manipulating humans]] easier. He has several less human forms too (1000 to be exact) but all of these are just avatars, or "masks". What his true form looks like is never even hinted, but as he is the soul of the Outer Gods, he might not even have a physical body outside the avatars.
** Although it's never explicitly mentioned, considering the insignificance of mankind in Lovecraft's cosmology it's very unlikely that the Elder Gods naturally look humanoid. More likely the human-like forms they appear in are used by them in order to not drive humans insane. The Elder Gods oppose the Great Old Ones, and since mankind would be destroyed if the Old Ones awaken, they are the closest thing the Derleth-subscribed mythos has for benevolent deities. [[CosmicHorrorStory Not that that's saying much]].
** In "Through the Gates of the Silver Key", Yog-Sothoth explicates a major implicit premise behind the whole Franchise/CthulhuMythos: practically everything we experience goes under this trope, including three-dimensional space, change and time, and the individuality of what we ordinarily think of as different creatures. Ramsey Campbell's "The Render Of Veils" exploits this variation of the trope to ''very'' disturbing effect.
** The titular "Colour" from ''Literature/TheColourOutOfSpace''. It is described is unlike any color in the normal spectrum, which under conventional logic would suggest it simply being invisible. It is, however, suggested that isn't even a colour, as it's only said a colour is the closest thing it can be compared to.
* In the ''Literature/{{Otherland}}'' series by Creator/TadWilliams, [[BigBad Felix Jongleur]] communicates with [[CapturedSuperEntity The Other]] through simulations so he can avoid interacting with it more directly. Unusual in that he's the one who determines what fake form he's perceiving, though The Other tends to warp the simulation into something a bit more disturbing.
* ''Franchise/DoctorWhoExpandedUniverse'':
** The seven-dimensional Legion, which appeared in both the ''Literature/DoctorWhoNewAdventures'' and the ''Literature/DoctorWhoMissingAdventures'', aren't even ''contiguous'' in three dimensions.
** The NA ''Sky Pirates!'' features a small pocket universe that is one of these, which is hiding a totally separate species that is also one, and it also heavily implies the Doctor himself falls into this category. Its loose sequel ''Death and Diplomacy'' extends this to the TARDIS too.
* The Ellimist always appears in a humanoid form before the Literature/{{Animorphs}}, while his true form is some techno-organic behemoth made out of countless pods, organs, feathers and the like, built around his original avian body, about half of which is still trapped inside a black hole.
* ''Angels'' are like this in Creator/CSLewis's Literature/SpaceTrilogy. Most of the time they just look like a vague shimmer of light; other attempts have produced wheels rolling on distant hills, a painful impact of colors (described as being like the "true sensation" of being hit in the eye by a rock), and (most successfully) a pair of otherworldly humanoids.
* In Ambrose Bierce's "The Damned Thing", there is a creature that is not of alien form but of alien ''color'' rendering it impossible to see properly.
* In ''[[Literature/AssassinFantastic Myhr's Adventure in Hell]]'', Terrin translates everything Myhr "sees" in Hell to something he can grasp without going insane. Mainly, a SugarBowl. With [[ItMakesSenseInContext naked lesbian demons]].
* In Creator/LarryNiven's ''Literature/KnownSpace'' series, [[HyperspaceIsAScaryPlace Hyperspace]] has this quality: the human brain is completely incapable of perceiving hyperspace, and carefully edits it out of your sight, and in about 60% of humans drives them insane. If you look at a window, you see the frame basically collapsed all around the window, which is slightly less disturbing. And if you look at a 360 degree panorama or hyperspace, you lose sight completely: you don't just go temporarily blind, your completely forget that you ever possessed sight, or what sight even is.
* A particularly nasty variation happens in ''Literature/HarryPotter,'' in the Boggart that takes the form of whatever you happen to fear most.
** Also happened over a decade before in the ''Literature/WorldsOfPower'' novelization of ''VideoGame/BlasterMaster'', in which the BigBad takes the form of whatever each person fears.
* In ''Literature/TheDresdenFiles'', there is a semi-divine being known as a Skinwalker, or Naagloshii. Just to look at it resembles a powerful bestial creature (with the ability to shape-shift). Certainly frightening, but by no means incomprehensible. However, when Harry uses his Wizard's Sight on it, even briefly, the effect is almost mind-shattering. The Naagloshii's true form is so inherently ''wrong'' that it literally takes hours for Harry to dissemble enough to function normally again (and he has to be careful not to think about it otherwise it reduces him to near unconsciousness). This is made even worse by the nature of the Sight, in that things that are Seen are remembered with perfect fidelity ''forever''.
** It is implied that the powerful movers and shakers of the supernatural world have similar (if not so utterly abominable) forms. The Queens of the Sidhe, particularly Mothers Summer and Winter, are beings of such intrinsic power that their true forms are likely to be completely incomprehensible.
** He Who Walks Behind is so alien that even his name cannot be comprehended, merely experienced as a rush of ugly emotions and a deep-seated hatred for all mortal life.
* Played straight and subverted in Dan Abnett's ''[[Literature/HorusHeresy Know No Fear]]''. While fleeing from Chaos Daemons two Guardsmen perceive them as horrific monsters with horns, spikes and forked tongues. However one member of their party, the seemingly immortal Oll Persson thinks to himself that what they are seeing is not the true form of a Daemon, it is what their minds are perceiving it as by pulling together bits of what they believe monsters look like. He however sees their true forms as shapeless clouds of warp energy and is able to kill them.
* ''Literature/PercyJacksonAndTheOlympians'': Looking at a god's true form is fatal to humans.
* ''Literature/TheSilmarillion'': [[EldritchAbomination Ungoliant's]] Unlight baffles and disorients even the [[FantasyPantheon Valar]].
* The various deities in ''Literature/TheElenium'' and its sequel series ''Literature/TheTamuli'' are hinted to be this, seeing as Aphrael can appear as a child, a grown woman, and even two people at the same time.
* In E. E. "Doc" Smith's ''Literature/{{Lensman}}'' series, it is impossible for anyone to properly see a Palainian or any other being that lives in distant planets that are perpetually cold. This is because these beings survive by being ''four''-dimensional (this is described as a "hyper" dimension); since everyone else lives and perceives in three dimensions, this extra-dimensional aspect is lost on them.
* A variant of this happens in ''Literature/LifeTheUniverseAndEverything'', when the giant supercomputer Hactar appears on a psychiatrist's couch. The couch appears the normal size for a couch, the computer appears the normal size for a giant spacebourne supercomputer, the illusion that one is sitting on top of the other is ... disturbing.
* [[Literature/{{Dragons}} The Last Dragon Chronicles]]: [[spoiler: Happened to Gwillana when she seen the inverted version of Gawain's head. She died from the sight of the ''thing''.]]
* ''Literature/JourneyToChaos'':
** This is the case with higher levels of magical powers. It's impossible for mortals to precieve what chaotic enegry or orderly influence truly look like and so instead they see golden-brown light and silver-grey light, respectively.
** Noitearc, the Third Founding Deity, is thought to be a giant tree because that is the best mortals can conceived it. The truth is much more complicated.
** When Reapers and Sowers exist as the abstract concepts "death" and life" respectively. Only their priesthoods are capable of seeing their true nature.

[[folder:Live-Action TV]]
* In ''Series/BabylonFive'', most people see the Vorlons as whatever equivalent their culture has to "angel," but Londo apparently sees nothing. Whether this was because the Vorlon ignored the Centauri race and focused their [[{{Precursors}} ancient genetic manipulation]] on the now-extinct Xon race that also evolved on Centauri Prime, or because Londo is just a {{Jerkass}}, is never explained. JMS claimed somewhere, in response to a fan's question, that Garibaldi (an agnostic) would have seen himself in Kosh. This statement seems to support the idea that it was Londo's having been touched by Shadows that led him to see nothing, rather than any faith-related matters/crises on his part.
* Parodied somewhat in ''Series/TheMiddleman'', when MM and Wendy visit the underworld. It appears to Wendy (and the camera) like an office building, but when she mentions this to MM, he claims to see an overgrown field full of feral creatures. [[spoiler:He's kidding, he sees an office. "Someone's funny in the underworld."]]
* ''Franchise/StarTrek'':
** Many portrayals of the Q Continuum, including the episode "Death Wish" of ''Series/StarTrekVoyager'', indicate that whenever a human enters the Continuum it looks like normal 4D space-time so that the human mind can comprehend it. In that episode, the crew joins the Q Continuum rebels against the Q old guard. Because the humans (and aliens) cannot comprehend Q weapons, they perceive the situation as the American Civil War... even the weapons they're using against the old guard Q. (Tuvok threatens these Q with their own weapons after being insulted.)
** The novel ''Literature/{{IQ}}'' goes so far as to say that the human mind does this automatically to stay sane and that Data normally shuts down because his android mind tries to "see" everything and crashes. Q must filter the sensor input so Data can function.
** In fact, the Q Continuum has never been truly perceived by visitors; they're always shown a representation which they could understand.
** In one novel, Picard perceives the Continuum as a weird-looking highway with a sign at the on-ramp saying something like "[[TakeThat Organians]], keep out!" The book also mentions that the Q don't like the Organians for [[HypocriticalHumor their smugness and the holier-than-thou attitude.]]
** The pilot episode of ''Series/StarTrekDeepSpaceNine'' plays this ''both'' ways. After Commander Sisko goes into the Bajoran wormhole, he meets the Bajoran Prophets: other dimensional beings who are the gods of Bajoran mythology. They assume the forms of Sisko's son and deceased wife, but not so Sisko can comprehend ''them'': they have no concept of beings who exist in linear time, so most of their interaction is ''them'' trying to figure out ''him!''
* In ''Series/{{Supernatural}}'':
** Angels cannot be comprehended except by their true vessel. Anyone else who glimpses their true form has their eyes melted out of their head, and anyone else (or any''thing'' around anyone else) that is around their true voice experiences what basically amounts to tornado conditions. To even be comprehended, they must first take a vessel. Any improper vessel, even the next closest thing, will eventually explode under the power.
** Archangels are even worse. The very presence of their true form is capable of doing all of the above, but with massive earthquakes, and instant death for anyone who's around. And this can even remain true when they're in a vessel. Raphael simply manifesting himself created a thunderstorm that knocked out all power to the Eastern Seaboard. In a later episode, he similarly created another thunderstorm when he manifested again. And when he showed up to protect a prophet, the growing light was tearing the room apart.
** According to Zachariah, his true form has 6 wings and 4 faces, one of which is a lion. This is actually in line with how Literature/TheBible describes angels.
* In ''Series/{{Grimm}}'', it's explained that it's generally a bad idea for normal humans to see the true forms of Wesen, as it could make them GoMadFromTheRevelation. Someone like Hank whose sanity was able to withstand the initial shock then ''thinks'' he was going crazy. For weeks, he was unable to sleep and was becoming increasingly paranoid. Nick had to stop him from shooting his own goddaughter in a blind panic when she accidentally reveals her GameFace.
* The Weeping Angels from ''Series/DoctorWho'', maybe. They can't be seen by any living being, and any time they can be observed, they instantly freeze into their trademark stone statue forms. It's implied, however, that they aren't necessarily limited to the form of angels when frozen in stone. We don't know ''why'' they freeze into rock beyond it being a defense mechanism, but for this very reason, what they are/look like ''un''frozen is anyone's guess.
* Observer in ''Series/MysteryScienceTheater3000'' insists that he exists [[BrainInAJar only as a brain]], and that if "lesser minds" perceive a body carrying around said brain, it is merely this trope in action. (All evidence in the show suggests that yes, he ''does'' have a body, although his brain is indeed outside of it.)

* In ''Podcast/TheMagnusArchives'' a mother sees something happen to her son that afterward she cannot bear to think about, let alone find the words to describe. The least inadequate description she can manage is [[spoiler:"the sky ate him"]].
* This happens somewhat frequently in ''Podcast/WelcomeToNightvale''. The Shadowy figures and the dog park itself are the most common examples, and the most notable one being "This" from "This just in" which is some sort of bizarre alien life form that Cecil completely fails to describe.

[[folder:Religion & Mythology]]
* ''Literature/TheBible'':
** In the Old Testament, God warns Moses that "you cannot see my face; for man shall not see me and live". Even Moses, could only see His back. God, like [[CthulhuMythos Yog-Sothoth]], also is omnipresent and exists at every point in the space-time continuum simultaneously yet transcending all of it. Islam takes this bit particularly seriously; arguing that if God's true form is alien and utterly incomprehensible to humans, then you cannot picture Him as anthropomorphic, therefore doing so and worshipping God through pictures is considered blasphemous, heretical idolatry ([[http://en.wikipedia.org/wiki/Iconoclasm Christianity under the Byzantine Empire also tried this]] but failed). Which then rubbed off on Moses a bit, since when he came back to everybody else his face blinded them into making him wear a veil. That said, several Old Testament figures (including Abraham, and for that matter Moses) are said to interact with God directly. The usual explanation is that they were speaking with an angel who was speaking directly for God (acting as a kind of cosmic telephone), or else that God was appearing in [[AFormYouAreComfortableWith a form they could comprehend]]. Christians often interpret these events as pre-incarnate appearances of Christ, the "image of the invisible God".
** In another incident (Exodus chapter 24 for those who care) God appeared in full glory for seventy-four leaders of Israel total. The fun part? It mentions that they all [[DidWeJustHaveTeaWithCthulhu ate and drank together]]. And it says that God stood on a sapphire pavement. And absolutely nothing else.
** Notably, this is subverted in the Catholic faith, as the saints will get to see God in all his glory in Heaven, often referred to as Beatific Vision. The idea behind it is that it should destroy your very soul, but God, being God, could perserve someone from letting that happen. (Or perhaps that "no man sees my face and lives" isn't so much of a concern if you've already died...)
** Also applies to the Seraphs, God's personal throne guards. They keep themselves hidden with their wings ([[EldritchAbomination they have six or more, by the way]]), as any mortal who looks at them directly bursts into flames or get annihilated instantly.
** Regarding Heaven, some believers reject a FluffyCloudHeaven and FireAndBrimstoneHell interpretation of the afterlife, instead preferring a metaphor-based no-true-form spin on where we cannot really comprehend the true form of those dimensions, and the literal interpretations above are just approximate interpretations of what is really happening in there. For example, Heaven is a state that is expressed in metaphor as a place of peace and bliss, while Hell is filled with so much of all kinds of sin, chaos, insanity and perversions against nature that the human (and supernatural) mind is unable to cope with it, and tries to resolve it into a Hell it can comprehend and express in art, namely a dark inferno filled with pain and disgusting {{Eldritch Abomination}}s.
** Averted with Jesus generally, although revealing Himself to Paul later on (after the Ascension), is likened to a lightning strike and knocks Paul off his horse, temporarily blinding him. Some forms of Gnosticism instead teach that Jesus never was physically incarnated, and had no tangible form.
** The New Testament condenses all of its incomprehensibility in the book of Revelation. Okay, so the four horsemen and great seven-headed beast are all ''probably'' metaphorical... and ''maybe'' angels in their native environment really are humanoids, some with six wings and using four of them to cover their faces and feet, or have four wings and four faces... but then John talks about things like how "the sky rolled up like a scroll," and you start to get an inkling of how ''everything'' this poor man's mind was experiencing utterly defied all human comprehension.
** Plus, John had to describe thing as he understood them, using similes of things he knew. At one point, he describes "locusts with breastplate of armour" whose "wings beat with the sound of a thousand chariots going into battle," which some scholars have theorized could have been a first century man's impression of a modern combat helicopter.
* OlderThanFeudalism: In the ''Literature/BhagavadGita'', [[Myth/HinduMythology Krishna]] actually shows Arjuna his ({{God}}'s) true form, which is basically a more extreme combination of EldritchAbomination and PurityPersonified. Krishna even mentions that Arjuna's mortal mind cannot comprehend all that he is, so Krishna briefly gives Arjuna divine sight so that Arjuna can comprehend. [[GoMadFromTheRevelation Arjuna still can't handle it,]] [[TooMuchForManToHandle and begs Krishna to retake human form.]]
* Played straight in Judaic and Talmudic literature, which says that God is incomprehensible. Oddly enough, some Kabbalistic poems describe him as though he were a human king, though the rabbis dismiss this as an elaborate metaphor.
* In [[Myth/ClassicalMythology Greek and Roman myth]], mortals that look upon a God/Goddess's true form instantly ''burst into flames and die'', because [[EldritchAbomination the gods are]] [[RuleofCool that awesome]].
** This is exactly what happened to Dionysus' mother Semele, one of Zeus' lovers; Hera tricked her into doubting that he was truly who he claimed to be, and she insisted that he reveal his true form. Due to an oath he made to fulfill a promise to her, he had to comply. He managed to save her unborn child however, placing him under the skin of his thigh until he could be born.
** This is also mentioned in ''Literature/PercyJacksonAndTheOlympians''.
* In ''Literature/TheQuran'' Moses asks to see God, who replies that the sight of Him to a living mortal would be too much... but He ''will'' reveal Himself to that mountain over there -- which immediately crumbles to dust.
* In the theological theory of UsefulNotes/{{Pandeism}}, it is proposed that those who are somehow able to contact the mind of our Creator as it unconsciously underlies our Universe find that experience so incomprehensible that their tiny human minds automatically defend themselves by interpreting such encounters as conscious communications from culturally familiar conceptions of gods, thereby explaining ''all'' revelation and scripture.
* In UsefulNotes/{{Taoism}}, from Creator/{{Laozi}} in the ''Daodejing'' : "[[http://personaltao.com/teachings/taoism/taoism-101/ The Tao]] we can describe is not the Tao that is."

[[folder:Tabletop Games]]
* ''TabletopGame/DungeonsAndDragons''
** The Obyriths, ''the'' primordial race of demons spawned by the Abyss eons before life arose on the Material Plane. Their bizarre, horrifyingly-alien appearances grant the Obyriths an ability called "Form of Madness." Their presence is established to be an affront to all five senses, which causes anyone who so much as ''senses'' them to be afflicted by an oftentimes permanent type of insanity (phobias, feelings of being consumed by insects, etc).
** Pale Night, the so-called Mother of Demons, is ancient even among the surviving Obyriths, but lacks the "Form of Madness" rule. She appears as a feminine figure wrapped in a white shroud blowing on a spectral breeze, which occasionally shifts to ''almost'' reveal what's underneath. This is neither her true form, nor a conventional illusion - instead the veil (which she can suppress with some effort) is a sort of cosmic censor, because her actual appearance is so horrifying that ''reality itself refuses to accept it''. Pale Night's "Truth Behind the Veil" rule means that anyone who gets a good look at her true form must make an immediate (very high) saving throw; success means that the character's mind refuses to comprehend what they're looking at. Those who fail die outright, and if revived remember nothing of what they saw beyond a feeling of sheer horror.
** Even some incredibly powerful forces of Good cannot be viewed safely by mortals. The ''Book of Exalted Deeds'' sourcebook mentions Zaphikiel, the greatest of the Hebdomad and the ruler of Mount Celestia. Only the gods themselves and the other Hebdomad can look upon him safely; anyone else who does so is said to be consumed by his overwhelming radiant energy and destroyed utterly. (Or maybe [[AscendToAHigherPlaneOfExistence ascended to a higher form]]; it depends on who you ask.)
* ''{{TabletopGame/Pathfinder}}'' works this into the stat block for [[CthulhuMythos Cthulhu]] himself. Since Cthulhu is [[AlienGeometries non-Euclidian]] and not wholly in the Material plane, or the third dimension at all for that matter, Cthulhu's attacks naturally cleave in a ten-foot cube around what he appears to actually strike. Additionally, his apparent and actual position don't line up quite right, granting him a flat 50% miss chance against all attacks. This can be defeated by using [[TrueSight the True Seeing spell]], but this is a generally inadvisable option, [[ThingsManWasNotMeantToKnow forcing a Will save versus instant and permanent]] [[GoMadFromTheRevelation insanity as you are suddenly forced to grasp Cthulhu's true form.]]
* ''Predators'', a book for ''TabletopGame/WerewolfTheForsaken'', introduces a being known only as the Unseen, which is ExactlyWhatItSaysOnTheTin. It's said that its form is so blasphemous that reality itself refuses to show it (just like Pale Night). The Unseen is uncannily good at hunting werewolf packs, to the point that some suggest it's a weapon created by a werewolf-hating EldritchAbomination. About the only way you learn of its presence is when your guts spill out of a seemingly spontaneous slice in your flesh.
** Also Hell, as presented in ''[[TabletopGame/NewWorldOfDarkness World of Darkness]]: Inferno'': a place comprised of so much depravity, so much sin, that the human (and supernatural) mind is unable to cope with it, and tries to resolve it into a Hell it can comprehend. Hell's corruption is so pervasive, even ''looking'' at it triggers a check on the KarmaMeter, as it worms its way into your soul.
* ''TabletopGame/MageTheAwakening'' presents magic in general and the Supernal particularly as this. The actual underlying processes of magic are beyond human beings' ability to understand, so there need to use metaphor and symbolism to compose their spells. For those few mages who become capable of entering the Supernal itself, it's necessary to expend great effort to force it into a comprehensable symbolic form, or else unfiltered contact with it will utterly obliterate the mage. One of the goals of [[AscendToAHigherPlaneOfExistence Ascension]] is to achieve a state in which true perception of the Supernal is possible.
* ''TabletopGame/MagicTheGathering'':
** The Alara block gives us the [[http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=188962 Nemesis of Rea-]] [[{{Candlejack}} THE END]].
-->''Words describing it fail. Pages relating it shrivel. Tales recounting it end.''
** When Jace comes into mental contact with [[EldritchAbomination Emrakul]], he perceives her as Emeria, an angelic deity inspired by greatly distorted legends of the Eldrazi Titan. She speaks politely, [[DidWeJustHaveTeaWithCthulhu they play chess]] (Jace even considers whether to offer her tea), then she turns the pieces into abominations and disappears.
--> '''"Emeria"''': Communication between us is difficult. I cannot talk to you. I do not even really know you exist. But you, your brain, it is very...adaptable.
* A fairly common trope in ''{{TabletopGame/Warhammer 40000}}''.
** [[DependingOnTheWriter In some depictions]] the Emperor of Mankind (a living deity) is so powerful that most mortals cannot gaze upon his true form (he occasionally disguises himself, both to hide his identity and to protect onlookers). Those who attempt to either die, are blinded by the power inherent in his visage, or else their minds simply are unable to process what they are seeing. Even those who can safely look at him (generally those who are extremely powerful or have strong wills) see him as somewhat indistinct, with his features constantly changing and shifting. Some of his sons, the Primarchs, inherited this ability.
** [[HyperspaceIsAScaryPlace The Warp]] is a dimension that is quite literally made of this trope. It is a realm of madness where emotion is given form and where the laws of physics do not apply. Ships travelling through the Warp have protective shutters drop down over their viewports, because those who gaze into the Warp have a high risk of going mad.
** Fittingly, given that the Warp is their home (and that they're made of the stuff), daemons are similarly subject to this trope. Daemons appear differently to different people, meaning that two soldiers can fight the same daemon at the same time and give completely different accounts of what it looked like (both of which would be wrong - the human mind is simply unable to process what a warp-denizen ''actually'' looks like, so it just substitutes something suitably terrifying in its place).
** Psykers, particularly human astropaths and navigators, are psychically-gifted individuals whose job it is to try and comprehend the true form of the Warp in order to steer ships through it (navigators) or pass messages through it (astropaths). It is an imperfect science at best - navigators fly as much on instinct and gut feelings as any actual dictates of their training and astropaths have a notoriously difficult job because incoming messages are less "transmission of the actual message" and more "indistinct thoughts and feelings that must be correctly interpreted to mean something vaguely close to what the sender was trying to say". Making the job harder is the fact that the Warp doesn't have linear time, either, so a message from across the galaxy can be 5 minutes old or 5 thousand years, or even come from the future.

[[folder:Video Games]]
* The TropeNamer is ''VideoGame/EarthBound''. "You cannot grasp the true form of Giygas' attack!" It's a tradition of ''VideoGame/{{MOTHER}}'' series' final bosses. In ''VideoGame/EarthBoundBeginnings'', Giygas (aka Giegue) attacked telepathically and without lifting a finger; his mental power was so far beyond the protagonists they couldn't process what he was using for PSI. In ''[=EarthBound=]'' he was [[BodyHorror "reduced" to an]] EldritchAbomination so large and all-encompassing, you simply couldn't tell where his attacks are coming from; in gameplay terms you were fighting against ''the background''. In ''VideoGame/{{Mother 3}}'', [[spoiler:Porky]] doesn't get an explanation, but it may be related to him having access to such ridiculously-advanced technology that it's a form of ClarkesThirdLaw. Additionally, [[spoiler:the Masked Man]] doesn't have announcements for most of his attacks like most other enemies in the game do; they simply just happen without warning.
* In ''[[VideoGame/PokemonMysteryDungeonGatesToInfinity Pokemon Mystery Dungeon: Gates to Infinity]]'' [[spoiler:the Bittercold's]] attacks are implied to be this. On top of [[spoiler:the Bittercold]] being an [[spoiler: OutsideContextProblem]], it also uses attacks [[spoiler:never seen in the Pokemon franchise before, hits the entire room, can confuse or vastly lower your party's stats, and the names of said attacks don't appear in the message log at all.]]
* The power of Houjuu Nue from ''VideoGame/{{Touhou}}'' is this minus the GoMadFromTheRevelation part. She can also imbue other things with the same characteristic by placing a "Seed of Unknown Form" on them, although knowing what the actual object is prevents it from working.
** An example of TruthInTelevision, but here because it's caused by one: as said in the BulletHell page, in VideoGame/{{Touhou}}'s ''Imperishable Night'', some parts are so complex that your brain will ''actually stop interpreting data on some parts of the screen, and you can feel it happening''.
** When the time gets really low, some patterns are made to get very hectic; some spellcards aren't designed to be timed-out, which is what happens when they aren't beaten before the timer zeros. These final forms in the last few seconds are so intricate that they defy comprehension at times.
* ''VideoGame/TeamFortress2'''s Mildly Disturbing Halloween Mask "appears as a moldering, eldritch veil of such manifold depravity, the human eye will not process the sheer enormity of its malevolence, and out of self-preservation will merely show you a brown paper bag with a team colored face painted on it."
* In ''VideoGame/TheWorldEndsWithYou'', it's impossible to make out the Composer's exact features, even though you can clearly tell who it is. He appears in a shroud of white light, and the artwork is sketchy and hard to focus on.
** Parodied in [[AlternateUniverse Another Day]], where it's explained that [[spoiler: the appearance of a certain character]] is entirely because [[BreakingTheFourthWall the player]] refuses to see the truth.
* The Patriots, when they finally speak, claim this status in ''VideoGame/MetalGearSolid2SonsOfLiberty.'' In fact, they say they're the embodiment of the collective will of the United States itself. They're a pretty UnreliableNarrator, though, and this was debunked in ''VideoGame/MetalGearSolid4GunsOfThePatriots.''
* The Wave Existence from ''VideoGame/{{Xenogears}}'' is a fourth-dimensional being that humans are unable to comprehend, and he appears as a vaguely star-like... thing from which waves emanate similarly to the ripples on a pond's surface.
* The dragons of ''VideoGame/{{Rift}}'' [[EldritchAbomination aren't dragons at all...]]
* The attacks of the {{Orochi}} in ''VideoGame/TheKingOfFighters'' involve a lot of whole-screen flashes and invisible hits--but more mysteriously, the special moves are unnamed. (... as long as [[VideoGame/NeoGeoBattleColiseum Orochi's clone Mizuchi]] doesn't count).
* In ''VideoGame/ShinMegamiTenseiStrangeJourney'':
** ''All'' demons are InvisibleToNormals. When a third (and [[TheChessmaster not entirely benevolent]]) third party grants the Investigation Team the Demon Summoning Program, they can "see" the demons... as blobs of unidentifiable static who speak only gibberish. You must fight and defeat these foes in order to identify them and be able to translate their speech.
** And even then, [[spoiler:the master, creator, and lord of the Schwarzwelt, as well as the mother of all life on the planet]], radiates such immense ''power'' that it's utterly ''impossible'' to recognize its form. Only by receiving the "brilliance" of a traveler of the Schwarzwelt can you get a glimpse at its true form.
** The bonus boss Yggdrasil has the ability to do something "almost imperceptible" (i.e. freeze time and attack). Basically, you've been struck so fast that the attack literally took no time at all. Naturally, you can't defeat it until this ability has been nullified.
* ''Franchise/TheElderScrolls''
** This is said to be the case for the series' AlienSky. The sun and stars aren't typical flaming orbs of gas, but are holes punched in reality by escaping spirits during the creation of Mundus, the mortal plane. They connect to Aetherius, the realm of magic, through which magic flows into Mundus, visible in the night sky as nebulae. The [[WeirdMoon two moons]] are said to be the sundered and rotting "flesh divinity" of Lorkhan (aka [[IHaveManyNames many other names]]), the [[GodIsDead "dead" creator god]] of Mundus. The eight planets are said to be the flesh divinity of the original eight [[OurGodsAreDifferent Aedra]], spirits who stayed and sacrificed much of their divine power/very beings to create Mundus. This all appears as it does because it is the best a mortal mind can do to comprehend it.
** The Daedric Princes are the spirits who did not participate in the creation of Mundus, and thus remain at full power with CompleteImmortality. They are really a form of EldritchAbomination who subscribe to their own BlueAndOrangeMorality depending on the [[AnthropomorphicPersonification sphere they represent]]. When dealing with mortals, however, they often take a form that mortals are [[AFormYouAreComfortableWith more comfortable and familiar with]]. One exception is Hermaeus Mora, the Daedric Prince of Knowledge (with a specialty in [[TheseAreThingsManWasNotMeantToKnow Eldritch knowledge]]). When he takes form, it tends to be as an infinite and mind-melting mass of tentacles and eyes. Within his realm of Apocrypha, his tentacles ''blot out the sky''.
** The eponymous Elder Scrolls, also called "Fragments of Creation", in addition to being [[TomeOfEldritchLore Tomes of Eldritch Lore]] and TomesOfProphecyAndFate, can be this depending on the reader. If the reader is completely untrained in reading the scrolls, the scrolls appear to be a sort of star chart with indecipherable glowing glyphs printed over (and under) the map. If the reader has some knowledge of the scrolls, they may be able to decipher some knowledge, but it will likely be incomplete, and the reader will be struck instantly blind. A fully trained and mentally prepared reader, such a member of the Cult of the Ancestor Moth (who tend to be the primary keepers and readers of the scrolls), can glean significant knowledge and recover their eyesight, but will eventually go blind after repeated readings. In all cases, including for people who merely study the nature of the scrolls and never even use them, [[GoMadFromTheRevelation complete madness]] is a frequent side effect. In ''[[VideoGame/TheElderScrollsVSkyrim Skyrim]]'', the [[PlayerCharacter Dragonborn]] can attempt to read an Elder Scroll. The result is a split second view of strange runes and writing before temporary blindness sets in. It is implied that that the only thing preventing you from going blind or insane is that you possess the soul of an immortal being (a [[DragonsAreDivine dragon]], in this case) and thus exist slightly outside of time, just like the scroll itself.
** ''[[VideoGame/TheElderScrollsIIIMorrowind Morrowind]]'' includes a comedic example with Boethiah's Pillow Book, a book so pornographic that "No words can describe what you see. Or what you think you see." It features into a ThievesGuild quest where it will be used as blackmail against a local politician.
* ''VideoGame/DevilMayCry 4'' has [[ArtifactOfDoom Pandora's box]], a MorphWeapon with 666 forms (not all useable), despite turning into a throwing glaive, a rocket launcher, or a''missile platform'' its most damaging attack is simply letting the box drop open, revealing the contents inside to everything in front of Dante.
* ''VideoGame/FinalFantasyVII'' has the ???? skill. That's right, even the ''name'' of the ability can't be determined. The effects of the spell is pretty nutty too as it only shows a weight with a question mark on it before dealing damage to the target. It deals damage equal to the amount of HP the character has lost in comparison to their max HP. "Revenge" was one name for the attack, but in ''VideoGame/FinalFantasyIX'' it was PlayedForLaughs, having the name "Pumpkin Head." The Pandora's Box skill invokes this as well, only showing a giant question mark floating through space before dealing massive non-elemental damage.
* The final battle with Sin in ''VideoGame/FinalFantasyX'' plays out somewhat like the ''VideoGame/EarthBound'' example above, with Sin's attacks not being labelled except for its LimitBreak, [[NonStandardGameOver Giga Graviton]].
* Foxface's special attack in ''VideoGame/ShadowHearts'' is just called !!!. [[HPToOne It reduces Yuri's HP to 1 no matter what they were before.]]
* ''Videoame/FiveNightsAtFreddys'' and its prequel features Golden Freddy, a rarely-encountered version of the game's BigBad, Freddy Fazbear. Encountering him in the first game will result in him mumbling random lines of gibberish, followed by him promptly crashing the game. The NightmareFuel of the situation is only enhanced by the fact that wherever he is, you will always hear the sounds of a little girl's eerie giggling.
* One of ''VideoGame/{{OFF}}''[='=]s endings implies there's something like this going on in regards to [[spoiler: [[VillainProtagonist The Batter]]. Sure, when you control him, you see just a man with baseball attire and a bat, but when, in the Judge's ending, you're using the Judge against him, what you see ''then'' is [[HumanoidAbomination a monstrosity that could only be called humanoid in the vaguest sense of the word]], wearing his same (perfectly fitting, which could argue against [[OneWingedAngel a transformation]]) baseball player attire. In the end, you never know if you, the Judge, or neither, ever saw the Batter properly]].
** WordOfGod says that You cannot grasp the true form happens to EVERYONE in the setting; with the whole world gone insane, everyone's brains are approximating what they THINK their senses are glimpsing. The Batter sees himself as a normal human but his enemies think he's a monstrous psycho mutant.
* ''VideoGame/EternalDarkness'' has a moment where Anthony, suspicious of the person telling him to deliver a scroll to Charlemagne the Frank, opens the scroll and catches a glimpse of a strange symbol before being BlownAcrossTheRoom by the power of the spell drawn on it. He then spends the rest of the chapter [[BodyHorror slowly rotting alive.]]
* Yami, the BigBad of ''Videogame/{{Okami}}'' is stated to be so alien an entity that it cannot be represented as either a human or animal. In actuality however, it takes the form of a mechanical sphere with a fish/fetus-like core.
* Almost certainly at work with any of the [[EldritchAbomination Old Gods]] you face in combat in WorldOfWarcraft. [[MeaningfulName Yogg-Saron]], the final boss of Ulduar in ''Wrath of the Lich King,'' appears as a giant face covered in fanged mouths, half-submerged in the floor with tentacles and manifestations emerging from the walls. However, given that throughout the course of the fight the players are literally teleported ''inside his brain'' into spaces that are larger than the room outside, this is almost certainly not his 'true' form.
** An in-game manifestation of GoMadFromTheRevelation is also at work in this fight; players have a Sanity bar which starts at 100, and slowly decreases throughout the fight if you do stupid things like ''looking directly at Yogg-Saron.''
* While a living being can easily look upon the "Dark Matter" entity from the ''Franchise/{{Kirby}}'' series, ''analyzing'' it is something else. [[spoiler:Star Dream, the ultra-advanced supercomputer developed by the Haltmann Works Company in ''[[VideoGame/KirbyPlanetRobobot Planet Robobot]]'', recreates the Blade version of Dark Matter last seen in ''VideoGame/KirbysDreamLand2''... not because it would be the ideal opponent, but because it is literally all that the supercomputer, something on par with ''[[VideoGame/KirbySuperStar Galactic Nova]]'', is capable of replicating. Apparently, even the mightiest digital minds in existence have a very hard time comprehending a being [[MadeOfEvil made of pure evil.]]]]
* The original ''VideoGame/NexusWar'' contained Nifleheim, the home plane of Hashaa, the [[PowersThatBe Elder Power]] of death and entropy. Nifleheim was a combination of Old West dustlands and dark, twisted Old World castles and forests. However, according to WordOfGod, what players saw was just a reflection of what was really there, and Nifleheim takes a different dark and spooky form with each cycle of the universe to reflect the changing cultural memes of different worlds.

[[folder:Visual Novel]]
* Tohno Shiki of ''VisualNovel/{{Tsukihime}}'' can see the 'death' of anything that has a flaw, but since human brains can't truly comprehend death as it applies to nonliving things, Shiki has to struggle to kill inanimate objects. He can even kill conceptual things like time or disease, although this places so much stress on his brain it nearly kills him. There are also beings who simply have no 'death', and thus cannot be killed, such as Arcueid during the night (which Shiki finds out to his chagrin during Ciel's route.)
* In ''VisualNovel/FateStayNight'', when Shirou tries using his Analysis magic on Gilgamesh's "sword" Ea, he cannot get a read on it. Despite being able to examine and copy any other bladed weapon in the blink of an eye, trying it on Ea gives him nothing. This is because Ea is a weapon that existed before humanity, and therefore existed before the ''concept'' of a sword even existed. It is a weapon beyond human understanding.
* Featherine Augustus Aurora from ''VisualNovel/UminekoWhenTheyCry'' is an interesting take on this. While not really an EldritchAbomination herself (we ''[[MindScrew think]]''), the form she assumes can vary. Being a [[ReallySevenHundredYearsOld witch of untold age]], she had to create a horseshoe-shaped device that hovers around her head. This thing not only contains all of her memories, but even her physical appearance. According to Lambdadelta, it once got dinged in the past, abruptly changing Featherine's personality and form.
** She can also use the power of You cannot grasp the true form to initiate an attack in a similar vein to [[VideoGame/{{Earthbound}} Giygas]]/[[SpellMyNameWithAnS Gie]][[VideoGame/{{MOTHER}} gue]]. [[spoiler:As the [[StoryBreakerPower Witch of Theatregoing]], she can literally ''stop time, rip out the script of a world and rewrite it''. In the eighth and final book when she [[CurbStompBattle "fights"]] Lambdadelta, she starts from the end of the incoming fight scene and works her way back, only to the part where she deals a rather ''brutal'' finishing blow to Lambda. She doesn't even write ''what'' killed Lambda, deciding to think it up later. When time resumes, the poor Witch of Certainty suffered just as Featherine wrote and had no idea what just happened before perishing, the narrative almost quoting this trope word for word.]]
** It gets better: [[spoiler:Featherine isn't even the genuine article, but rather an AuthorAvatar of Ikuko Hachijō.]]
** Bernkastel and Lambdadelta themselves might also qualify for this trope. The former is [[spoiler:actually Ikuko's pet cat who takes the form of an older [[VisualNovel/HigurashiWhenTheyCry Rika Furude]] in the meta-world]], and the latter is literally [[BizarreAlienBiology made out of candy]].
* The people at NitroPlus made the brilliant decision in ''VisualNovel/SayaNoUta'' to never actually show any clear shots of the monster(s). You only ever get to see individual limbs or extreme close-ups of certain body parts, with most of it being covered in darkness. What you get instead are detailed descriptions that paints mental images in your head. They realized that the true form of the monster would be more horrifying if the reader could only imagine it, and never actually see it. After all, to show the monster would mean that its looks were comprehensible. For it to be a true eldritch abomination however, it must be unimaginable.

[[folder:Web Originals]]
* ''WebOriginal/OrionsArm'' takes a slightly different approach. An intelligence of a lower toposophic ''cannot'' understand a higher intelligence. Humans are considered S0 intelligences ([[PunyHumans the lowest level of sapient intelligence]]), and cannot comprehend the nature or thoughts of a S1 intelligence (Basic Transapient). However, a S1 is likewise unable to comprehend a S2, and so forth. The highest intelligences are the Greater Archailects (S6), which exist physically as multiple planet-sized objects networked together, sometimes at least partially in alternate universes of their own creation. It's said that an archailect's ''individual thoughts'' are themselves sentient entities, whatever that means.
** Actually, S6 is the highest level that baseline humans ("S0s") are aware of. Given that an S6 is effectively a vast and all-powerful interstellar civilisation in itself, an S7 would be... perhaps literally incomprehensible to humans.
* A good many Wiki/{{SCP|Foundation}}s are likely to qualify, although most are written as mundane things with strange properties, rather than strange things appearing as mundane things.
** The most prominent of these would probably be [[http://www.scp-wiki.net/scp-055 SCP-055]], which is a... thing. Anybody who sees it will completely forget about it within a few minutes. Anybody who hears or sees secondhand details, including picture and video, about it will also forget about those within a few minutes. The object is classified as Keter (most dangerous) simply because the Foundation ''doesn't know'' if it's dangerous, specifically mentioning that it could have killed hundreds of personnel in the process of getting it and they wouldn't remember any of it. People ''can'' remember what it isn't, however, and so far the Foundation has determined that SCP-055 is not spherical.
*** [[http://www.scp-wiki.net/revenants This story]] dials the horror of such a... thing that isn't spherical up to eleven.
* The Narrator in ''{{WebOriginal/Shell}}'' tries to describe the EldritchAbomination, but cannot grasp its true form when drawing it.
* In ''Webcomic/{{Homestuck}}'', the [[EldritchAbomination Horrorterrors]] are psychically percieved by humans as adorable squid creatures (about whom a cartoon is made) due to this effect.
* [[InvokedTrope Invoked]] in ''Webcomic/{{Housepets}}'' [[http://www.housepetscomic.com/2010/07/07/the-truth-the-whole-truth/ when Pete and the Dragon Spirit convocated King]] [[EldritchLocation into their realm]] King sees his own universe as a RPG which [[CosmicEntity both]] [[PhysicalGod beings]] literally play with.
* It is implied in Franchise/TheSlenderManMythos that this is one of Slendy's characteristics, given that he has been know to grow CombatTentacles, his use of both On and OffScreenTeleportation, and taking into account the lack of distinguishing (read: [[TheBlank ANY]]) facial features.
* Podcast/RPPRActualPlay: "Though the [[EldritchAbomination lure is alien, offensive to his eyes,]] [[WeirdnessCensor the fish sees food, and bites,]] and dies a death beyond his imagining. ''[...]'' And we fall prey to our mind's own metaphors."
* In a CreepyPasta called [[http://creepypasta.wikia.com/wiki/The_Cave "The Cave"]], there is the EldritchAbomination known as the Jackal. The closest to a description the narrator manages to provide when it is seen is that whereas its depiction had been scratched out from pictures on the walls before, looking at the real thing is a lot like looking at those pictures, because all you can see is still something blurry and formless.
* The portals in ''Literature/TheSalvationWar'' are very hard for anyone to really comprehend what they are seeing, describing it in completely contradictory terms (for example, one character notes it looks both parallel and perpendicular to the ground). It is mentioned at it at least a seven dimensional object, and what is seen is a best the "shadow" of the real thing.
* The Literature/WhateleyUniverse is simply packed to the brim with creatures whose true form cannot or should not be perceived by mortals. The character of [[NightmareFuelStationAttendant Nacht]] gives an apt analogy:
-->Imagine that you’re in a boat and you see some fish in the water. You reach your hand into the water to grab one of the fish. From the fish’s point of view, this weird thing with a flat body and five tentacles and a weird thick tail that reaches out into nowhere, but no eyes, mouth or fins, just appeared in a shower of bubbles. It moves around in ways that have nothing to do with swishing its tail or moving fins in any way. Then this thing which shouldn’t be any stronger than the fish is, and has no eyes with which to see, wraps itself around one of the other fish, and suddenly that fish disappears from the first fish’s plane of reference. The hand is utterly alien to the fish, and it operates in ways that would seem magical to it, if fish had the brains to encompass the notion of magic. I think that your Headhunter is like that: it has much, but not all of the power of the demon at its disposal, and it has a perspective that most mortals can’t have, and it operates on very different principles and motives.
* DimensionalProphecyOfZoharRedux The attacking Caine aliens have a form which is incomprehensible and in most parts even invisible. The only things people can see are hands which look skeletal and have lots of tumours growing on them, attacking people, or giant eyes floating in the air. And most people who saw the Caine went insane and/or started to hallucinate. Because of this, during Caine attacks, it is unknown if there is just one Caine attacking, or if there are several attackers at the same time.

[[folder:Western Animation]]
* Robin from ''WesternAnimation/TeenTitans'' sees the entrance to the afterlife as a regular wooden door with LIFE AND DEATH written on it.
** Which is taken directly out of [[ComicBook/TeenTitans one of the comics]] when Beast Boy and Raven venture there. They even make a remark about it;
-->'''Beast Boy''': I can't believe the afterlife has a sense of humor.
-->'''Raven''': Yes, it disturbs me as well.
* In one episode of ''WesternAnimation/IAmWeasel'', Weasel and Baboon use a bike so fast it exceeds the speed of light in which they find in AnotherDimension where the living beings look like ham. I. R. Baboon tries to eat one even after the beings explain they aren't really ham, they simply appear as such to their minds.
* One episode of ''WesternAnimation/InvaderZim'' parodies this with the Meekrob, who fly into Dib's room in the form of strange, glowing aliens, and then inexplicably transform into giant floating sneakers.
-->'''Dib''': Who... what are you, and - why did you transform into giant ''shoes?'' \\
'''Meekrob''': [[EnergyBeing We are beings of pure energy]]. [[AFormYouAreComfortableWith This is merely a form that your human brain can understand]]. \\
'''Dib''': But- you just looked like aliens before you turned into shoes.\\
'''Meekrob''': Hmm... yes. But you couldn't ''comprehend'' that.\\
'''Dib''': Yes I could.
** Of course, [[spoiler: this was all fake anyway]].
* After getting crap for using AFormYouAreComfortableWith, an alien on ''WesternAnimation/TheVentureBrothers'' got mad enough to show them his real form. All the audience got to see was that it revealed itself by ripping its "face" open down the middle, had flashing lights, tentacles, and was enough to make a (mentally handicapped) character crap his pants.
* The alien Vok in ''WesternAnimation/BeastWars:{{Transformers}}'' capture Optimus Primal and communicate with him. But to do so, they first scan his memory banks for what he would consider a figure of authority --they choose to manifest as the disembodied head of [[{{Satan}} Unicron]]. They're actually creepy glowing energy skull things that [[OrcusOnHisThrone do very little]].

[[folder:Real Life]]
* Color and perception both have plenty of unusual examples:
** Ever wondered why PurpleIsTheNewBlack? '''[[Analysis/PurpleIsTheNewBlack Because there is no black.]]''' A true black would reflect no light whatsoever and would look like a hole in space. That only happens in black holes. And since vision works by light reflecting off of objects, and true black is the absorption of light, our human eyes literally ''cannot'' see true black. A good demonstration is [[https://en.wikipedia.org/wiki/Vantablack Vantablack]]. That photo is neither a pile of it sitting on a sheet of aluminum foil, nor is it a PortableHole. It's simply a layer of Vantablack coating a sheet of foil. The reason it looks like a blank, formless blob is because it absorbs all the light needed to see the foil's crinkles and ridges.
** One of the great challenges for an artist learning advanced color theory is to get comfortable with exploiting the [[https://en.wikipedia.org/wiki/Color_constancy Color Constancy illusion]]. In any piece with strong MoodLighting, colors you think you are seeing are usually just slight tints of one or two hues. What looks like a strong green in the image may actually be, say, a pale orange-grey- it only ''looks'' green compared to the colors around it.
** The color magenta does not correspond to a single wavelength of light, and is not part of the light spectrum - there is no such thing as "pure" magenta light. Rather, it is the brain's way of interpreting multiple wavelengths of light from disparate parts of the color spectrum being received by your eye at the same time. [[http://www.null-hypothesis.co.uk/science/strange-but-true/colour_spectrum_magenta_complimentary_bizarre In the case of magenta, it is a combination of red and violet light, which are from opposite ends of the color spectrum; in order to "properly" interpret this, rather than seeing it as an intermediate color, the human brain instead perceives it as magenta.]] \\
Yet while pink is often highlighted as an example of such an "unnatural" color, in reality, the majority of colors humans see are this - anything which is not one of the [[http://en.wikipedia.org/wiki/File:Spectrum.svg colors of the rainbow]] is the human brain's way of interpreting a mixture of different wavelengths of light. Indeed, white and gray are the most common examples - white light is merely light which contains a mixture of light wavelengths in high enough and close-to-equal concentration, whereas gray is the same thing, only there is less stimulation. Thus, while there is red, orange, yellow, green, blue, and violet light, colors like pink, white, and black are mixtures of light. Creatures with different peaks for their visual spectrum would likely interpret such mixed colors in a different way. A fascinating experiment involving a similar illusory color made from tiny checkerboards of green and red proved impossible to describe properly in normal terms. Trained artists could describe aspects of it like its chroma value and saturation, but the color itself refused categorization within the color wheel.
** [[SchmuckBait Try to imagine a completely new colour.]] Just try it. You can't. The brain cannot process or even imagine a color that is outside the range of the electromagnetic spectrum that is visible to humans. This is why Don Joyce's "Squant" never ceases to madden people with its premise and Crosley's matter-of-fact discussion.
** Language is also linked to our perception colors. If a language and culture has a bigger difference between colors, people in that society are better able to distinguish colors. This goes the other way too, as people who lack distinctions for colors are slower to recognize differences between them. However, the idea that they are incapable of doing so is pure myth; the difference is in fractions of a second of recognition speed, not actual differences in visual acuity. There is evidence that colors which humans cannot manufacture do not have names and are therefore not recognized. Scholars have studied ancient texts, including The Iliad and The Odyssey, specifically looking at the usage of color words. Many very strange color identifications are given: Green Honey, Violet Sheep, and Wine-Dark Seas. These were often regarded as "colorful" metaphors until linguist Guy Deutscher realized '''there is no blue mentioned in them anywhere'''. At the time there were no blue dyes available and there simply wasn't a word for blue, so people had to use other colors to describe what we now know as blue. This is a pattern across all cultures: color usage appears in stages, and blue is always last. This can also be seen in young children; if they don't yet know a color they'll refer to things of that color by a color they do know. An example, again involving blue, children will refer to the sky as white (which most adults will reflexively say is blue) before they know the color blue.
** Some people have four types of cone cells [[note]]the type of cell which is primarily responsible for our perception of color[[/note]] in their eyes rather than three, which gives them a small advantage in distinguishing colors, particularly in the red region of the spectrum. Because these genes are carried on the X chromosome, this condition is more common in women, but some men also carry both variants of the red-green gene on a single X chromosome. [[note]]You aren't missing much if you don't have this condition, for the record. It mostly just makes it really, really frustrating to set the gamma on your monitor using only three colors, and makes people look at you funny when you try to explain the obvious difference between red and dark maroon.[[/note]] People with only two sets of cone cells instead of three (color blindness) or with inadequate numbers of or malfunctioning cone cells (milder forms of color blindness) are less able to distinguish colors, and as a result colors which contain light of the wavelength they are "blind" to appear considerably different to them. Related to this are images taken by telescopes (or other instruments for the case) designed to work with wavelengths that do not correspond with visible light, like [[http://en.wikipedia.org/wiki/Spitzer_Space_Telescope Spitzer]] (infrared) or [[http://en.wikipedia.org/wiki/Chandra_X-ray_Observatory Chandra]] (X-Rays). The images of SpaceClouds that we see that have been taken by them are actually processed false-color images so we can see them with our eyes; if they were sensible to those wavelengths while we'd see something more or less with the same aspect (ie: an infrared-bright region of star formation, an X-Ray emitting galactic nucleus, etc) their "colors" would be quite different.
** There was an interesting experiment where 25 women (the necessary genetic deviations cannot occur in men, sadly) were tested on their vision; the experiment showed them white rings on a screen, and one ring had UV-light added. Eventually, all but one of the women got things wrong, while the remaining woman was told she actually could see beyond the normal visual spectrum. Imagine her trying to describe what she generally sees.
** In (amateur) astronomy an interesting physiological effect takes often place when observing a [[https://en.wikipedia.org/wiki/Double_star double star]], as the less bright of the pair is seen in the [[https://en.wikipedia.org/wiki/Complementary_colors complementary color]] of the brightest one -ie, when observing a double whose brightest component is orange seeing the less luminous as green or blue, even if it's actually yellow or white.-
** Human brains are designed to perceive the world in three dimensions, but the human eye only perceives the world in two dimensions. The brain uses the 2-dimensional input from each eye in addition to some image process recognition to construct the perception of a third dimension inside the brain, which is why people with only one eye have diminished depth perception. This can be thrown off in various well-known ways, such as presenting a different image to each eye - something 3D glasses take advantage of to create a stronger illusion of the third dimension from a 2D image. Many visual illusions take advantage of the brain's visual processing - perspective in paintings is a matter of tricking the eye into seeing 3D distance which is not actually present, while real-world environments can be constructed in order to trick the brain into seeing a 3D space as being larger, smaller, or otherwise strangely shaped. Because the brain is designed to construct 3D images, it makes visualizing a object which has more than three spatial dimensions, such as some mathematical constructs, very strange - one of the more common ways of doing so is essentially taking 3-dimensional "slices" of a 4D object, and presenting them in series over time. Similarly, human brains are designed to only perceive one dimension of time. Time and space aren't intrinsically different from one-another, so in the same way that a 1-dimensional being could not perceive the concept of turning around, we can only see the flow of time in one direction. If the universe had two or more dimensions of time, then you could "turn around" and face the past. What that would look like is anyone's guess.
** [[http://serendip.brynmawr.edu/bb/blindspot1.html Blind spots]]. Your brain compensates for the existing blind spots in your eyes (spots which are not covered with cones or rods due to the presence of the optical nerve), filling in the lost information. People who get retinal burns (because of handling lasers or arc welders carelessly, for example) get additional blind spots in addition to the natural ones. The brain input-processing mechanism conceals these spots and the afflicted human thinks he's perfectly okay, up until the point that enough of his retina is burned that the brain is no longer able to compensate.
** Extremely distant objects in the sky are so far away that the brain does not naturally model them as being three-dimensional objects in space. This is especially true of the Sun, Moon, and stars, all of which are huge objects which are extremely large distances away, but the brain does not naturally perceive them as large, nor accurately model their distance, due to lack of perspective.
** This is why the moon '''appears''' to be larger when it is low on the horizon versus up in the sky. There isn't an atmospheric lensing effect as many people believe, it's simply a visual illusion. The exact reasons [[https://en.wikipedia.org/wiki/Moon_illusion are still debated]] - sometimes it's stated to be because there are trees/buildings/the ground now visible in proximity to it and your brain is better able to judge a relative size, but it seems to work just as well with a featureless sea as the background. Another explanation is that we are simply used to objects on the horizon being smaller, but the moon doesn't become smaller, so we automatically compensate.
** Even non-celestial distant objects can mess with the brain's perception if there is no relative comparison. Just look at a plane in the sky, you have no way of judging how high or how fast it is moving other than "it's small so it's got to be pretty high". From the ground 2 planes (or their contrails) could appear to intersect with each other and nearly collide, when in actuality there may be 2 miles or more difference in their altitudes. Without perspective the brain just gives up and renders it as a 2D image.
* Because the brain is essentially a very complicated computer made out of meat, brain damage can severely mess up people's perception of reality.
** A patient with the two hemispheres of their brain severed may be asked to pick up an object with one hand, pick up the object named, but then call the object by the wrong name when they are asked what object it is, or vice-versa. Such people may also only be able to solve math shown to one of their eyes; if it is shown to the wrong eye exclusively, they may not be able to properly solve the problem.
** Left side paralysis caused by brain damage, not direct nerve damage, leads to the common illusion that the non-functioning body parts belong to somebody else. The reason is that since the damage originates from the brain, there is no feedback from the limbs to signal that something is wrong with them, since they are technically totally functional. Therefore, the brain invents the idea that the limbs must belong to somebody else. In cognitive science, this is referred to as confabulation. It is actually rather scary that a person under such an illusion is more or less incapable of understanding that they ARE, in fact, not right. They will acknowledge any arguments made by people trying to convince them, but they will not change their mind. When the brain no longer needs to delude itself, people are confused how they could have ever believed something so ridiculous. In some cases, the same defensive mental mechanism reoccurs, and people conveniently forget their previous puzzlement. And it should be noted, this happens in people who are otherwise perfectly reasonable, sane and rational, as far as it is possible to judge.
** We rely on our memories far more than we realize, so it's next to impossible to put yourself in the place of someone who has Retrograde (loss of old memories) or Anterograde (inability to form new memories) Amnesia. As a result of damage, their brains simply lose the ability to store neural information.
** Aphasia. Depending on the type, someone can understand speech but not produce it, produce speech but not understand it, have an [[PokemonSpeak extremely limited vocabulary]], or [[AndIMustScream completely lose all understanding of language]].
* [[http://en.wikipedia.org/wiki/Synesthesia Synesthesia]] is another odd side effect of how brains function. Someone with synesthesia not only perceives the world in the same way that others do, but additional senses are stimulated as nerve signals cross over in the brain. Each synesthetic person has their own way in which their senses cross over; some see sounds, or hear colors, or feel colors. This is a very strange sort of qualia, and even two synesthetic people who share the same crossings-over may not perceive them in the same way.
* Humans are extremely bad at understanding large numbers.
** This is a problem when it comes to making decisions, as people will actually end up [[AMillionIsAStatistic caring more about a single person than a thousand people because a single person is easier for them to understand;]] the same applies to donating money to save a small or large number of geese from an environmental catastrophe - the larger cited number actually drew SMALLER donations in one study.
** Douglas Adams pointed out that infinity is flat and uninteresting, since it doesn't present magnitude or scale, ergo, really big things are necessary to show just how big it is. A basic example is the [[http://en.wikipedia.org/wiki/Googolplex Googolplex]], a number so large that it cannot be represented longhand, even if we filled the known universe with protons and wrote a zero on each one.
** An even bigger number is [[http://en.wikipedia.org/wiki/Grahams_number Graham's number]] which cannot be expressed ''with any standard system of numerical representation'' including such things as exponent stacks (e.g. a^b^c^d^e...). However, like all things, it can be expressed using certain specialized forms of recursive notation. Graham's number is the maximum limit of the number of unique variations of a particular problem. The minimal limit, at the time, was thought to be '''''6'''''. It has since been increased to 13. Numbers this large can't be constructed physically, and cannot be simulated on a 1 to 1 basis.
--->''[[TextbookHumor Clearly, there is some room for improvement, here.]]''
** Infinity itself is difficult for most people to understand, and also has very strange consequences, as two infinite quantities are not necessarily equal, and some infinities are, effectively, bigger than others. Related to this is infinitesimal, which is a something that can only be described as a value that is infinitely small, but still reasonably significant. It's probably first heard when taking a physics class or learning about integrals. There are also an infinite number of numbers between 0 and 1, or indeed, between any two values.
* Fractals.
** Their number of dimensions varies whether it's topological or not, and their "true" (Hausdorff) number of dimensions is often non-integer. The Menger sponge, for example, is an object which has zero volume and an infinite surface area. Which means that any Menger sponge you'll see is only an approximation.
** For another example, look at Sierpinski's Triangles (imagine a Triforce where you replace every triangle with another Triforce ad infinitum). It has roughly 1.585 dimensions (more precisely, log(3)/log(2).
** Averted in general with mathematics and geometry, however; while these things might be difficult to ''visualize'', people with the right mathematical training ''are'' able to fully understand mathematical concepts on their own "true" terms without resorting to visual metaphors (in fact, learning to do this is essential to progress; ''not'' learning to do this is a large part of why some people find math hard).
* Although imaginary numbers are ExactlyWhatItSaysOnTheTin, they actually have, more or less, practical and perhaps physical applications. Wiki/ThatOtherWiki [[http://en.wikipedia.org/wiki/Complex_number#Applications has plenty of examples]].
* [[http://www.cracked.com/article_19936_the-5-most-terrifying-ways-your-brain-can-turn-you.html This]] ''Website/{{Cracked}}'' article contains some examples, particularly one mental disorder that makes it so you can only grasp the form of one thing at a time.
* Your own incompetence. Competency in a task is linked to your ability to judge your ability at said task; thus, incompetent people, with no training in the task, will consider themselves to be vastly more competent than they actually are. This is known as the [[http://en.wikipedia.org/wiki/Dunning-kruger_effect Dunning-Kruger effect;]] however, it can be mitigated with training. Unfortunately, the very incompetence of the people may prevent them from seeking out said training, because they don't realize how incompetent they actually are. There is one exception to this rule: studies of people with clinical depression revealed that many individuals with depression have a far more realistic grasp of their own limitations than the average person. [[IgnoranceIsBliss Think about that for a second.]]
* Particles at the quantum level. To clarify, most subatomic particles exhibit 'wave-particle duality', meaning sometimes they behave like a wave, sometimes like a particle, and their true nature (if indeed they have one) is neither. In fact the Heisenberg Uncertainty Principle essentially states that the more you know about one's position, the less you know about its speed or trajectory and visa versa. The kicker comes when you learn that this is not due to a shortcoming in our measuring equipment, but a law of the universe itself; there is a hard limit on how much the universe will allow you to learn about a particle, since the mere act of observing changes its nature. Since our brains are evolved to deal with concepts on the macroscopic scale, this is very hard to imagine.
* Dark Matter/Energy. A postulated form of "something" that makes up over 90% of the universe but does not have any interaction with the electromagnetic spectrum. In fact the only "Observable" effect, and hint that it exists, is its effect on gravity. Humans (and all life as we know it) is made of "normal" matter and evolved to perceive the world through a thin slice of the EM spectrum. Through technology we have been able to extend that thin slice to allow use to visualize other parts of the EM spectrum (which really makes another example of this trope: we cannot grasp the true form of any part of the EM spectrum except for the visible spectrum, only convert it into visual light which we are able to understand), but we are still limited to the parts of the universe that are also able to interact with the EM spectrum. Something that doesn't interact with it is therefore completely unimaginable.
* All of Planck's constants are incomprehensible except two: Planck mass and Planck energy. The rest describe things like smallest unit of time or length to maximum temperature. Planck mass, while describing something on the quantum level, is the mass of a flea egg, while Plank energy is a tank of gasoline.
* The concept of a timeless universe.
** According to this idea, the flow of time as we perceive, from past to future, is just an illusion. We 3D beings are only capable of perceiving small points in time (the fourth dimension) happening around us, while there is no intrinsic difference between any given point. They are all as real as ever conceivable point in space. A good comparison would be to look at a river. The entire river exists regardless of our position in it, but we can only see the portion we are swimming in right now. Technically speaking, this also means everything that ever has and ever will happen is happening all at once.
** If you could see yourself in the fourth dimension, you'd look like a huge worm made of every single version of yourself from every moment across your entire life. There would be your embryo at one end and your deceased self at the other. And all of this is without getting into the idea of [[AlternateTimeline branching]] [[UpToEleven pathways.]]
* The amount of radiation in the universe that we can perceive is infinitesimally small. If the entire EM spectrum were laid out from one end of the United States to the end, the visible light portion would be 1/100th the thickness of a piece of paper. That is everything our eyes can detect. Just try and imagine Radio waves, X-rays, or Gamma rays on their own, without any false color images.
* There are [[https://en.wikipedia.org/wiki/Void_(astronomy) certain places]] in the universe that contain...nothing. Nothing whatsoever. Not just no stars, galaxies, or planets, but absolutely ''no matter or energy whatsoever.'' No atoms, no subatomic particles, no electromagnetic radiation, not even any indirect signs of dark matter. [[https://en.wikipedia.org/wiki/CMB_cold_spot#Supervoid One of the largest of these]] is almost '''four billion''' light years across. A space four thousand times bigger than our galaxy, and it's completely empty.
* The universe itself. It goes on forever, has no boundaries, but at the same time, finite[[note]]but, very likely, ''[[https://en.wikipedia.org/wiki/Observable_universe#The_Universe_versus_the_observable_universe far larger]]'' than the part we can see from Earth, and perhaps even infinite[[/note]]. If you were able to move infinitely fast, you would just end up where you started. Creator/BillBryson used this example to try to explain it in ''A Short History of Nearly Everything'': Imagine a two-dimensional being who comes through a dimensional portal to Earth. He tries to determine the size of Earth by traveling along its surface in a straight line, but keeps coming back to his starting point, and can't figure out how he did it. This is what is happening in the universe, which is "curving" in a way that our brains just can't really grasp. Just try to conceive how this can happen.\\
And there's the issue of attempting to grasp its size: If the distances just in our Solar System are already mind-numbing, a light-year is almost ''ten trillion kilometers'', but at galactic (short of cosmological) scale is insignificant (just our galaxy, the Milky Way, has a size of one hundred thousand times that and the Andromeda Galaxy, the nearest major galaxy, is at more than 2.5 million l. y.). That justifies to a point why SciFiWritersHaveNoSenseOfScale -simply put, even astronomers cannot really wrap their heads around what those distances really mean.
* A lot of the really pioneering minds in advanced mathematics tend to have at at least minor breakdowns now and then, particularly those studying esoteric things like set theory (aka infinity +1 ), alternative systems of math like knot theory, and those studying problems which may or may not actually have solutions. [[TheseAreThingsManWasNotMeantToKnow Apparently, its hard on a brain to spend your days trying to grasp the true form of things that exist in fractional dimensions braided around a 4-sphere]].
* Negative mass. Try and imagine holding an object that weights -5 kilograms.
** An object like that would probably float and/or repell anything. It probably (thankfully) only exists as a thought experiment since it violates various core laws of the universe as we understand it at least, but to quote Seamus Zelazny Harper from ''Series/{{Andromeda}}'' in regards to negative atomic mass: "That's like a planet with a negative number of moons." Only, in his universe, that stuff actually exists and it's suitably terrifying.
* Tornadoes in open fields. Most people who witness a massive tornado in empty fields, find themselves confused if the funnel is moving towards them or just sitting stationary. This is due to humans having difficulty with comprehending spatial awareness and object enormity without having a reference point. The effect will often make it seem like the tornado isn't moving - maybe even moving away - when in actuality it's coming straight for you.
* The concept of CessationOfExistence after death. Try and imagine what true oblivion is - you perceive nothing, you feel nothing, you remember nothing, and you ''ARE'' nothing. You can't. You simply can't.
* Sleep. When you do it, it might feel like a sudden stop and start, but your brain doesn't actually shut down. You simply lose conscious control for anywhere from a few minutes to several hours while your body acts on its own, maintaining its vitals and keeping you busy with dreams until you wake back up. Most of what happens then doesn't even stick and will be forgotten the moment you wake up. Since the brain is still active, we don't even know the true purpose of sleep in the first place. All we know for sure is, if we go too long without it, we die.
* Someone else's thoughts.
** While you might be able to get a sense of what someone else is thinking, you can never tell exactly what someone else has on their mind. You can't climb into their consciousness and experience the world through their perceptions. The way colors, smells, sounds, and language are interpreted in your brain are completely unique to you and only you. This is the only way you'll experience the world your entire life. We aren't even born with the ability to consider that other people can have different perspectives and mental representations than our own.
** There's no solid way of knowing what another person would do in your place. Even if it's someone you're close friends with or a family member you've know your whole life, you'll never know for certain what they would do in your place. Everyone has their own views on morality, truth, fairness, justice, mercy, acceptance, etc. Unless a person tells you outright what they think about something, you'll never know for certain how they interpret it. You'll never know if they're on your side or if they disagree with you completely.
** This state of mental variation means all of us are truly unique. Something you dislike about yourself might actually be something another person really loves about you. The people around you can still manage to surprise you, even if you've known them for years. Most importantly, even if it feels like you're the only one in the world who feels a certain way, [[YouAreNotAlone there are countless other people who have an idea of what you're going through. Not a total sense of what you're feeling, but an idea of it. People who care about you and want you to be happy. Many of them have greater knowledge and experience than you and are more than happy to share it. All you have to do is ask.]]
* Many people on the autistic spectrum describe their perception of the world around them in this way due to the way they process sensory input. ''Aquamarine Blue 5'', a book of essays written by autistics, describes experiences like these.
* If the "Interface Theory of Perception" is to be believed, this is an ''evolutionary mechanic''. The gist of its argument is that each species has evolved a unique visual perception of reality to benefit their unique behavior. A good metaphor compares our perception of reality to the user interface of a computer, which masks the complex, inner workings of a computer from the user. To test this phenomenon, an "interface game" was set up to determine which of two groups would survive: organisms that perceive an objective reality versus organisms that perceive a subjective reality. '''The truth-perceiving organisms died out.'''
* People exposed to something that they have literally no frame of reference for in their prior experience often flail to construct what they are seeing in their minds. A classic example is the Native Americans believing Cortez's horsemen were giant creatures with two heads, because they had never seen a horse, let alone a man riding one, before. Another example is the crazed German private who babbled to his superior about "a crocodile in the trenches" upon seeing a tank for the first time.

---> [[GoMadFromTheRevelation AAARRRRGGGGHH!!!]]