Who said "Gratitude is for people who think they have much to lose."?

This quote is attributed to The Joker.

Gratitude is for people who think they have much to lose. - The Joker

"Gratitude is for people who think they have much to lose."

The Joker Gratitude

"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."

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

"Everything burns."

"Gratitude makes life richer."

"A grateful heart is a happy heart."

"Respect those who came before us."

"Life's greatest treasures are the people we love"