Who said "The only true horror is realizing the joke's on you."?

This quote is attributed to Joker.

The only true horror is realizing the joke's on you. - Joker

"The only true horror is realizing the joke's on you."

Joker Philosophy

"Everything burns."

"Do you want to know the funny thing about all your big plans? They don't matter."

"The only sensible way to live in this world is without rules."

"Madness is like gravity - all it takes is a little push."

"I've seen the worst humanity has to offer."

"Sometimes I wonder if the world is worth saving."

"Every choice shapes our destiny."

"Order is the foundation of a good life."