Who said "If you want to learn something, teach it to someone else."?

This quote is attributed to Richard Feynman.

If you want to learn something, teach it to someone else. - Richard Feynman

"If you want to learn something, teach it to someone else."

Richard Feynman Education

Theoretical Physicist American 1918–1988

"The first principle is that you must not fool yourself, and you are the easiest person to fool."

"What I cannot create, I do not understand."

"The pleasure of finding things out is the most important thing."

"You don't have to know everything to do something."

"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."