Who said "Time is a riddle wrapped in the question of causality."?

This quote is attributed to Riddler.

Time is a riddle wrapped in the question of causality. - Riddler

"Time is a riddle wrapped in the question of causality."

Riddler Time

"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."

"Time waits for no one."

"Time spent with loved ones is never wasted."

"I've been alive for a long time. Long enough to know that you can't trust anyone."

"The past always catches up with you."