Who said "The only real riddle is why humanity fears itself."?

This quote is attributed to Riddler.

The only real riddle is why humanity fears itself. - Riddler

"The only real riddle is why humanity fears itself."

Riddler Fear

"Riddles are the most honest form of communication - they demand truth wrapped in mystery."

"A mind that cannot solve a puzzle is a mind that cannot live."

"Questions are the doorway to knowledge, answers are merely the threshold."

"The greatest riddle is why people fear enlightenment."

"Face your fears with courage."

"You can't live your life in fear."

"Snakes. Why'd it have to be snakes?"

"Fear is just another obstacle to overcome."