Who said "I'm the only one who doesn't lie to himself."?

This quote is attributed to Joker.

I'm the only one who doesn't lie to himself. - Joker

"I'm the only one who doesn't lie to himself."

Joker Truth

"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."

"Lucy, you got some 'splainin' to do!"

"You must always be honest with the people you love."

"Truth always comes out in the end."

"Honesty is always the best policy."