Best single lines of dialogue from artistic works

Speaking of Commando there is always this exchange…

“You scared, motherf*****? Well, you should be, because this Green Beret is going to kick your big a**”

“I eat Green Berets for breakfast. And right now, I’m very hungry!”

There is this exchange in The Outlaw Josey Wales:

Josey Wales: “Reckon I’m right popular. You a bounty hunter?”

Bounty hunter #1: “A man’s got to do something for a living these days.”

Josey Wales: “Dyin’ ain’t much of a living, boy.”

You forgot Rae Dawn Chong’s rejoinder: “I can’t believe this macho bull#$%&”

There many great lines from Airplane! so I pick the one I have quoted the most:

Some bad happens and I say:

“It looks like I picked the wrong week to stop sniffing glue.”

Did he turn it into a screenplay?

In the 1973 film The Exorcist, when a priest asks Regan why she doesn’t break her own straps and release herself, she says…

“That’s much too vulgar a display of power.”

That line always gives me chills!

“I lie awake at night wondering what fresh hell tomorrow will bring.”

Yes. Yes, I did it; I killed Yvette; I hated her SO much: i-i-the f, flames, flames, flames, on the side of my face, breathing, breathle, heaving breaths…

“The first thing we do, we kill all the lawyers.” Shakespeare.

Feel free to substitute realtors, developers, politicians, the people who stopped us from enjoying those little greenish glass bottles of Coke that definitely tasted better, etc.

Rae Dawn Chong: What did you do with Sully?

Arnold: I let him go.

“All those moments will be lost in time, like tears in rain”.

“Like grains of sand through an hourglass, so flow the days of our lives.”

—Ted “Theodore” Logan

In the same vein of last lines:
“Shut up and deal”
The Apartment

And, spoken by Humphrey Bogart to the woman who has just this moment become his ex-fiancee:
“Next time, rattle before you strike.”
The Stand-in

And a line I shouldn’t have to source:
“Vorga, I kill you filthy!”
The Stars My Destination

“You song-singin’ skinny old maid!”

—Humphrey Bogart to Katharine Hepburn in The African Queen

Good one, but better than,

“By the authority vested in me by Kaiser William the Second I pronounce you man and wife. Proceed with the execution.”

“If it ain’t, it’ll do till the mess gets here.”

Good one! Best line in the film, spoken by (in my cockeyed opinion) the true hero.

And her character’s “Nature, Mr. Allnutt, is what we are put in this world to rise above.”

" I hate little notes on my pillow. Like this morning. ‘We’re all out of cornflakes. F.U.’ It took me three hours to figure out that ‘F.U.’ was Felix Unger." - The Odd Couple

I wonder if, in the development of the play, Neil Simon named Felix specifically to make that joke possible, because it’s worth it.

My favorite line from that movie involves the sheer Katharine-Hepburn-ness with which she says “…dear? What is your first name?”