The Joker: Wanna know how I got these scars? My father was….a drinker. And a fiend. And one night he goes off crazier than usual. Mommy gets the kitchen knife to defend herself. He doesn’t like that. Not. One. Bit. So, me watching, he takes the knife to her, laughing while he does it. Turns to me and he says “Why so serious?” Comes at me with the knife,”Why so serious?” He sticks the blade in my mouth. “Let’s put a smile on that face!” And….. Why so serious?

Gotham National Bank Manager: The criminals in this town used to believe in things. Honor. Respect. Look at you! What do you believe in? What do you believe in!
The Joker: I believe whatever doesn’t kill you simply makes you… stranger.

The Joker: Come on, I want you do it, I want you to do it. Come on, hit me. Hit me!

The Joker: Good evening, ladies and gentlemen. We are tonight’s entertainment! I only have one question. Where is Harvey Dent? You know where Harvey is? You know who he is? You know where I can find Harvey? I need to talk to him about something. Just something, a little. The Joker: No…

The Joker: You know, you remind of my father… I hated my father!

The Joker: And I thought my jokes were bad…

The Joker: You know, I’ll settle for his loved ones.
Gentleman at Party: We’re not intimidated by thugs!
The Joker: You know, you remind me of my father. I hated my father!
Rachel Dawes: Okay, stop!
The Joker: Well, hello, beautiful. You must be Harvey’s squeeze, hmm? And you are beautiful. You look nervous. Is it the scars? You want to know how I got ‘em? Come here. Hey! Look at me. So I had a wife, beautiful, like you, who tells me I worry too much. Who tells me I ought to smile more. Who gambles and gets in deep with the sharks… look at me! One day, they carve her face. And we have no money for surgeries. She can’t take it. I just want to see her smile again, hmm? I just want her to know that I don’t care about the scars. So… I stick a razor in my mouth and do this…to myself. And you know what? She can’t stand the sight of me! She leaves. Now I see the funny side. Now I’m always smiling! A little fight in you. I like that.
Batman: Then you’re going to love me.