How does the saying go...? "Two wrongs don't make a right"?

[The very idea makes Lobelia laugh. He couldn't care less about right and wrong. It isn't human to feign consideration for anything but one's own self-satisfaction.]

Heh-ahaha! Très bien! You really are quite vile. I had expected we'd share some commonalities, but I'm beginning to think you're far worse than me!