Who said "Killing is too easy - it's the suffering that matters."?

This quote is attributed to Joker.

Killing is too easy - it's the suffering that matters. - Joker

"Killing is too easy - it's the suffering that matters."

Joker Power

"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."

"Power without control is just destruction."

"Power is not about control, it's about influence"

"The world doesn't need me to be the hero. It just needs me to be dangerous."

"The claws come out when I need them to."