This is, in my opinon, possibly one of the best line in the whole history of literature:
JG: Tell that bastard to look at my face, then look in the mirror, and then ask himself if my moral stature was ever at the mercy of his actions.
I also love this one (the first line is just to clarify what the second means):
Mr. Thompson: Don't you see? What I've got to offer you is your life!
JG: It's not yours to give, Mr. Thompson.
The whole Galt @ the Wayne Falkland is brilliant.