What's the best movie quote ever?

If you ain't first you're last (Ricky Bobby)

Is this recording

The last line of A Boy and His Dog.

Good Trade!

i'll be back

"A Boys best friend is his mother"

at least type in the whole quote -

I don't know who you are. I don't know what you want. If you are looking for ransom, I can tell you I don't have money. But what I do have, is a very particular set of skills, skills I have acquired over a very long career. If you don't let my daughter go now, that'll be the end of it. I will not look for you. I will not pursue you. But if you don't, I will look for you. I will find you. And I will kill you.

other than that, one of my other favorites is -

"You.....shall not....PASS!!!!!"

The last line of A Boy and His Dog (1971) its a total spoiler.

2nd best: Man, now that's a real shame when folks be throwing away a perfectly good white boy like that. - Better Off Dead (1985)

Don't know about the best single quote (it's arguable) - but the best "pair of quotes" belongs to Clint Eastwood and Chief Dan George in "The Outlaw Josey Wales":

Clint: "Whenever I get to likin' someone, they ain't around long."

Chief Dan George: "I notice when you get to disliking someone, they ain't around for long neither."

https://www.youtube.com/watch?v=-TjI7giA93g

"I'm from Jersey" from the movie Mulholland Falls

https://www.youtube.com/watch?v=fCg6JuYRUFk

"Yeah, I've been following him, on my own time. And anybody can tell I didn't do that to him."

"How?"

"Cause he looks too damn good, that's how!"

Dirty Harry (1971)