Who said "The greatest teacher is often failure"?

This quote is attributed to Tony Hancock.

The greatest teacher is often failure - Tony Hancock

"The greatest teacher is often failure"

Tony Hancock Education

Sketch Comedian British 1924–1968

"Things like that don't happen to people like me"

"Stone me, what a life!"

"The lad himself"

"I'm a bit of a dreamer, really"

"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."