Who said "Courage is asking the questions others fear to ask."?

This quote is attributed to Riddler.

Courage is asking the questions others fear to ask. - Riddler

"Courage is asking the questions others fear to ask."

Riddler Courage

"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."

"Never let fear stop you from chasing your dreams."

"Courage is being afraid but doing it anyway."

"Sometimes you gotta do what you gotta do."

"Sometimes you have to be the monster to stop the monsters."