Who said "To doubt is to think; to think is to grow in understanding."?

This quote is attributed to Roger Penrose.

To doubt is to think; to think is to grow in understanding. - Roger Penrose

"To doubt is to think; to think is to grow in understanding."

Roger Penrose Education

Mathematical Physicist English Born 1931 (age 95)

"The universe is a far grander thing than we ordinarily imagine it to be."

"Consciousness is the phenomenon whereby the universe knows itself."

"I would say that the universe has a very special role to play in the theory of quantum mechanics."

"The road to reality is paved with mathematics."

"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."