Who said "Those who cannot riddle, cannot think."?

This quote is attributed to Riddler.

Those who cannot riddle, cannot think. - Riddler

"Those who cannot riddle, cannot think."

Riddler Education

"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."

"Education opens doors."

"Education opens doors to endless possibilities."

"I ain't got the education you got, bub."

"You can't put a price on history."