Who said "Fear and courage are two sides of the same coin."?

This quote is attributed to The Thing.

Fear and courage are two sides of the same coin. - The Thing

"Fear and courage are two sides of the same coin."

The Thing Fear

"It's clobberin' time!"

"I'm a walking pile of rocks, but I got heart!"

"Somebody's gotta look out for the little guy."

"I ain't pretty, but I got brains."

"Face your fears with courage."

"You can't live your life in fear."

"Snakes. Why'd it have to be snakes?"

"Fear is just another obstacle to overcome."