Who said "Madness is like gravity. All it takes is a little push."?

This quote is attributed to The Joker.

Madness is like gravity. All it takes is a little push. - The Joker

"Madness is like gravity. All it takes is a little push."

The Joker Change

"All you care about is money. This town deserves a better class of criminal."

"I'm not a monster. I'm just ahead of the curve."

"Everything burns."

"I believe whatever doesn't kill you simply makes you stranger."

"Change brings new opportunities."

"Every day is a new opportunity."

"Healing doesn't mean forgetting."

"You either get better or you get bitter."