"You just don't get it. I'm still here! I still exist! That means you still turn into me."
"Just out of curiosity, did you become a wimp overnight, or was it a gradual process?"
"You still convinced he's me?"
"Yes, but you're not convinced."
"Not in the slightest. Except for his features, there is nothing about him that I find familiar!"
— Captain Picard and Counselor Troi, Star Trek: The Next Generation ("Time Squared")
"I didn't spend the last ten years looking for a way to get this crew home earlier so you could throw it all away on some intergalactic goodwill mission."
"I think we should go back to sickbay."
"Why, so you can have me sedated?"
"So I can have the Doctor reconfirm your identity. I refuse to believe I'll ever become as cynical as you."
— Admiral and Captain Janeway, Star Trek: Voyager ("Endgame")
"There was a point in Looper where I thought I was going to love it, rather than merely just like a lot. When JGL sits down with his older self, he reacts like we all would; with horror and contempt. Itís human nature to fear what youíll become; the first wrinkle, the retreat of the hairline, the droop of the breast; few of us could meet that face to face across a table without turning away. Likewise, Bruce Willis, when confronted by his younger self, sees a dumb prick too stupid to appreciate his youth, with nothing in his immediate future but a bunch of mistakes. Put in the same position with the me from my teenage years, Iím sure Iíd find myself reaching across, grabbing a handful of purple hair, and slapping myself right out of my Korn t-shirt."
Tenth Doctor: For once, I would like to know where I'm going.
Eleventh Doctor: No, you really wouldn't!
— Doctor Who, "The Day of the Doctor"