Doc Holliday: Cattle don't graze after sheep.

Doc Holliday: I need a little money and I thought maybe you'd like to come in with me.
[Pat laughs]
Doc Holliday: What's the matter?
Pat Garrett: I'll let you have the money, but if the deal's anything like that last one of yours, you better not tell me about it.
Doc Holliday: Why not?
[Pat pulls back his vest and reveals his Sheriff's badge]
Doc Holliday: Where'd you get that?
Pat Garrett: Oh, they stuck it on me about two weeks ago.
Doc Holliday: You're the last man I thought would be so easily satisfied.
Pat Garrett: Well, l... l... , a man's gotta settle down sometime.

Doc Holliday: Well, Billy, I guess this is it. Men are pretty much like children after all. Have you ever seen two kids wrestling in the yard? They push and they tussle and maybe they look like they're fighting... but they're not. They're really friends and everything is fun. Then pretty soon they play a little too rough. One of them gets mad. And in the end, somebody always gets hurt. So for you and me, this is where somebody gets hurt. But when it's over, and however it turns out, son, no hard feelings.

[first lines]
Townsman: Doc Holliday just got off the stagecoach! Do you want me and some of the boys to come along with you?
Pat Garrett: Why do ask that?
Townsman: Well, I certainly wouldn't want to fool around with him if I were alone.
Pat Garrett: I don't blame you, but I ain't gonna make no trouble for Doc Holliday. He's my best friend!

[Pat and Doc rescue Rio, whom Billy has left bound, gagged and strung up by wrists within sight of a desert waterhole]
Doc Holliday: You know, I think he's in love with you.
Rio: What are you talking about?
Doc Holliday: The crazier a man is for a woman, the crazier he thinks and the crazier he acts.
Rio: He's only crazy about one thing - himself.
Pat Garrett: Hey, that gives me a thought. Maybe we'll get Mr. Billy after all.
Rio: How?
Pat Garrett: Like you said - if he's crazy enought to do you like this, maybe he's crazy enough to come back to turn you loose.