David. If you kill him, he will win.
This isn't going to have a happy ending.
If we catch John Doe and he turns out to be the devil, I mean if he's Satan himself, that might live up to our expectations, but he's not the devil. He's just a man.
[discovering what's inside the package]
It's impressive to see a man feeding off his emotions.
[Reading from one of John Doe's journals]
If John Doe's head splits open and a UFO should fly out, I want you to have expected it.
[to Mills] What do you think?
People don't want a hero, they want to eat cheeseburgers, play the lotto and watch television.
[after finding out that Detective Mills's apartment is close to the railway tracks]
[chuckles to himself]
[laughs hysterically, Tracy joins in]