Who said "The only true constant is change itself."?

This quote is attributed to Joker.

The only true constant is change itself. - Joker

"The only true constant is change itself."

Joker Change

"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."

"Change brings new opportunities."

"Every day is a new opportunity."

"Healing doesn't mean forgetting."

"You either get better or you get bitter."