The Departed quotes

Colin Sullivan: Yeah, shoot a cop, Einstein. Watch what happens.
Billy Costigan: What would happen is this bullet would go right through your fucking head!

Colin, Billy

My theory on Feds is that they're like mushrooms, feed 'em shit and keep 'em in the dark

Queenan

Oliver Queenan: Do you know what we do here? My section?
Billy Costigan: Sir, yes, sir. I have an idea...
Dignam: Whoa, whoa, whoa. Let's say you have no idea and leave it at that, okay? No idea. Zip. None. If you had an idea of what we do, we would not be good at what we do, now would we? We would be cunts. Are you calling us cunts?
Oliver Queenan: Staff Sergeant Dignam has a style of his own. I'm afraid we all have to get used to it.

Dignam, Billy