If you're good at something, never do it for free. - The Joker

I believe whatever doesn't kill you simply makes you... Stranger. - The Joker

Why so serious? - The Joker

What was that? I should kill everyone and escape? Sorry. The voices. (Laughs) I'm kidding! ... That's not what they really said. - Harley Quinn

I'm not Crazy. My Reality is just Different from yours. - The Cheshire Cat

"The statistics on sanity are that one out of every four people is suffering from a mental illness. Look at your 3 best friends. If they're ok, then it's you." 
- Rita Mae Brown

"Insanity is relative. It depends on who has who locked in what cage." 
- Ray Bradbury

"I became insane, with long intervals of horrible sanity." 
- Edgar Allan Poe

"There's a fine line between genius and insanity. I have erased this line." 
 - Oscar Levant

I'm peeling the skin off my face
'Cause I really hate being safe
The normal's, they make me afraid
The crazies, they make me feel sane

I'm nuts, baby, I'm mad,
The craziest friend that you've ever had
You think I'm psycho, you think I'm gone
Tell the psychiatrist something is wrong
Over the bend, entirely bonkers
You like me best when I'm off my rocker
Tell you a secret, I'm not alarmed
So what if I'm crazy? The best people are

- Melanie Martinez in Mad Hatter