Police Camera Tech: Who the fuck are you?
Dignam: I'm the guy who does his job. You must be the other guy.

Frank Costello: When you decide to be something, you can be it. That's what they don't tell you in the church. When I was your age they would say we can become cops, or criminals. Today, what I'm saying to you is this: when you're facing a loaded gun, what's the difference?

[first lines]
Frank Costello: I don't want to be a product of my environment. I want my environment to be a product of me. Years ago we had the church. That was only a way of saying - we had each other. The Knights of Columbus were real head-breakers; true guineas. They took over their piece of the city. Twenty years after an Irishman couldn't get a fucking job, we had the presidency. May rest in peace. That's what the niggers don't realize. If I got one thing against the black chappies, it's this - no one gives it to you. You have to take it.

Frank Costello: Church wants you on your place. Kneel, stand, kneel, stand. If you go for that sort of thing, I don't know what to do for you. A man makes his own way. No one gives it to you. You have to take it. "Non serviam."
Young Colin: James Joyce.
Frank Costello: Smart, Colin. Guineas from the north and down Providence try to tell me what to do. And, uh, something maybe happen to them. Maybe, uh, like that.
[cuts to Costello executing two people on beach]

Frank Costello: [talking about Costigan] Do you trust him?
Mr. French: Well these days, who's reliable?
Frank Costello: His uncle Jackie was. Yeah, you can't trust a guy acts like he's got nothing to lose.
Mr. French: I'm reliable.
Frank Costello: Arnold, you're one in a million.
Mr. French: Ten. Ten million.
Frank Costello: What about your wife, Arnold?
Mr. French: Well, I thought she was.
Frank Costello: [laughing] She wasn't!
Mr. French: Well, she got reliable.
[flashback showing French strangling his wife]

Colin Sullivan: Fuck you, fuckin' queers. Fucking firemen gettin' pussy for the first time in the history of fire or pussy. Go save a cat from a tree, you fucking homos.