There are a lot of great quotes in the movie.
Ulysses Everett McGill: That's not the issue Delmar. Even if that did put you square with the Lord, the State of Mississippi's a little more hard-nosed.
Ulysses Everett McGill: Me an' the old lady are gonna pick up the pieces and retie the knot, mixaphorically speaking.
Pete: Wait a minute. Who elected you leader of this outfit?
Ulysses Everett McGill: Well Pete, I figured it should be the one with the capacity for abstract thought. But if that ain't the consensus view, then hell, let's put it to a vote.
Pete: Suits me. I'm voting for yours truly.
Ulysses Everett McGill: Well I'm voting for yours truly too.
[Everett and Pete look at Delmar for the deciding vote]
Delmar O'Donnell: Okay... I'm with you fellas.
Pete: I've always wondered, what's the devil look like?
Ulysses Everett McGill: Well, there are all manner of lesser imps and demons, Pete, but the great Satan hisself is red and scaly with a bifurcated tail, and he carries a hay fork.
Tommy Johnson: Oh, no. No, sir. He's white, as white as you folks, with empty eyes and a big hollow voice. He likes to travel around with a mean old hound. That's right.
Tommy Johnson: I had to be up at that there crossroads last midnight, to sell my soul to the devil.
Ulysses Everett McGill: Well, ain't it a small world, spiritually speaking. Pete and Delmar just been baptized and saved. I guess I'm the only one that remains unaffiliated.
Ulysses Everett McGill: Pete, it's a fool that looks for logic in the chambers of the human heart.
Homer Stokes: This band of miscreants, this very evening, interfered with a lynch mob in the performance of its duty.
Ulysses Everett McGill: What'd the devil give you for your soul, Tommy?
Tommy Johnson: Well, he taught me to play this here guitar real good.
Delmar O'Donnell: Oh son, for that you sold your everlasting soul?
Tommy Johnson: Well, I wasn't usin' it.