Mills: Wait a minute. I thought all you did was kill innocent people.
Doe: Innocent? Is that supposed to be funny? An obese man, a disgusting man who could barely stand up, who you'd point out to friends so they could join you in mocking him. If you saw him while you were eating, you wouldn't be able to finish your meal. After him, I picked the lawyer, and you both must have secretly been thanking me. This man dedicated his life to making money by lying with every breath that he could muster to keeping murderers and rapists on the streets!
Mills: Murderers. Murderers, John, like yourself.
Doe: A woman so ugly inside that she couldn't bear living if she couldn't be beautiful on the outside. A drug dealer... a drug-dealing pederast, actually. And let's not forget the disease-spreading whore. Only in a world this shitty could you even try to say these were innocent people and keep a straight face. But that's the point. 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...It's trivial. 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.
Mills tells Doe that he thought that Doe was killing innocent people. Doe disagrees and goes on a tirade about it.