John Doe: It seems that envy is my sin.
Detective David Mills: Honestly, have you ever seen anything like this? Detective William Somerset: No.
John Doe: Become vengance, David. Become wrath.
John Doe: It's more comfortable for you to label me as insane. David Mills: It's VERY comfortable.
John Doe: We see a deadly sin on every street corner, in every home, and we tolerate it. We tolerate it because it's common, it's trival. We tolerate it morning, noon, and night. Well, not anymore. I'm setting the example. And what I've done is going to be puzzled over, and studied, and followed... forever.
Detective William Somerset: Anyone who spends a significant amount of time with me finds me disagreeable.
David Mills: Yeah, a landlord's dream: a paralyzed tenant with no tongue. William Somerset: Who pays the rent on time.
David Mills: Fuckin' Dante... poetry-writing faggot! Piece of shit, motherfucker!
Dr. Beardsley: He's experienced about as much pain and suffering as anyone I've encountered, give or take, and he still has Hell to look forward to.
Detective Mills: Wait a minute... I thought all you did was kill innocent people. John Doe: Innocent? Is that supposed to be funny?
John Doe: Realize detective, the only reason that I'm here right now is that I wanted to be. David Mills: No, no, we would have got you eventually. John Doe: Oh really? So, what were you doing? Biding your time? Toying with me? Allowing five innocent people to die until you felt like springing your trap? Tell me, what was the indisputable evidence you were going to use on me right before I walked up to you and put my hands in the air?
John Doe: What sick ridiculous puppets we are / and what gross little stage we dance on / What fun we have dancing and fucking / Not a care in the world / Not knowing that we are nothing / We are not what was intended.
John Doe: Wanting people to listen, you can't just tap them on the shoulder anymore. You have to hit them with a sledgehammer, and then you'll notice you've got their strict attention.
William Somerset: This guy's methodical, exacting, and worst of all, patient. David Mills: He's a nut-bag! Just because the fucker's got a library card doesn't make him Yoda!
Detective William Somerset: It's impressive to see a man feeding off his emotions.
Detective David Mills: C'mon, he's insane. Look. Right now he's probably dancing around in his grandma's panties, yeah, rubbing himself in peanut butter.
Detective David Mills: I don't think you're quitting because you believe these things you say. I don't. I think you want to believe them, because you're quitting. And you want me to agree with you, and you want me to say, "Yeah, yeah, yeah. You're right. It's all fucked up. It's a fucking mess. We should all go live in a fucking log cabin." But I won't. I don't agree with you. I do not. I can't.
Det. Somerset: This isn't going to have a happy ending.
Detective David Mills: You're no messiah. You're a movie of the week. You're a fucking t-shirt, at best.
Detective David Mills: I've been trying to figure something in my head, and maybe you can help me out, yeah? When a person is insane, as you clearly are, do you know that you're insane? Maybe you're just sitting around, reading "Guns and Ammo", masturbating in your own feces, do you just stop and go, "Wow! It is amazing how fucking crazy I really am!"? Yeah. Do you guys do that?
[William Somerset looks at an object in the road.] David Mills: What do you got? William Somerset: Dead dog. John Doe: I didn't do that.
Detective William Somerset: Ernest Hemingway once wrote, "The world is a fine place and worth fighting for." I agree with the second part.
Detective William Somerset: 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.
John Doe: On the subway today, a man came up to me to start a conversation. He made small talk, a lonely man talking about the weather and other things. I tried to be pleasant and accommodating, but my head hurt from his banality. I almost didn't notice it had happened, but I suddenly threw up all over him. He was not pleased, and I couldn't stop laughing.
John Doe: Don't ask me to pity those people. I don't mourn them any more than I do the thousands that died at Sodom and Gomorrah. Detective William Somerset: Is that to say, John, that what you were doing was God's good work? John Doe: The Lord works in mysterious ways.
Detective William Somerset: If John Doe's head splits open and a UFO should fly out, I want you to have expected it.
California: Somebody call somebody.