"...No, don't move," [Ford] added as Arthur began to uncurl himself, "you'd better be prepared for the jump into hyperspace. It's unpleasantly like being drunk."
"What's so unpleasant about being drunk?"
"You ask a glass of water."
"Hell is only a word. The reality is much, much worse."
"Where we're going, we won't need eyes to see."
— Dr. William Weir, Event Horizon.
Planeswalking isn't about walking. It's about falling and screaming.
Phillip: 'What's out there?
Phillip: Do you want to talk about it?
"Traveling through hyperspace ain't like dusting crops, boy! Without precise calculations we could fly right through a star or bounce too close to a supernova, and that'd end your trip real quick, wouldn't it?"
Brainstorm: The first rule of interstellar travel: Never stand next to a quantum generator when it's about to flout the laws of physics.
Rodimus: So who broke the rule?
Brainstorm: Um... Good question.
For the warp is a strange and terrible place. You might as well throw a traveler into a sea of sharks and tell him to swim home as send him through the warp unprotected. Better it is not to let common man travel through the stars. Better still, let him not know such a thing is feasible.
— Fra Safrane, 5th aide to Navigator Da'el. Comment made prior to the departure of the second mission to search for the missing freighter Pride of Angelos
It is forbidden to speak of what I see in the Great Beyond. I could hint at impossible, half-seen castles in the distance, or rivers of pure vibrance flowing to where they fall upon themselves forever, of mothers' love and children' hate given form. But nothing could give you the vaguest notion of what it is truly like.
— Varentias Jugold of the Navilis Nobilite
Between the stars the ancient unseen enemies of mankind wait and hunger. Every voyage into the nothing is a confrontation with horror, with the implacable things of the warp, and with man's own innermost fear.
Our thoughts light the Darkness that others may cross space
We are one with the Emperor, ours souls are joined in his will.
Praise the Emperor whose sacrifice is life as ours is death.
Hail his name the Master of Mankind.
— Credo Astronomicon
"Travellin' through space is boring. [...] Unless strange fings start happenin', which dey usually do when yer out in da warp. One time we 'ad some bluddy great ugly fing come straight outta Weird Lugwort's 'ead! It butchered 'alf da lads! Yer, dat was pretty entertainin'."
— Bigmaw, Warhammer 40,000