Who said "When the goin' gets tough, the tough get goin'."?

This quote is attributed to The Thing.

When the goin' gets tough, the tough get goin'. - The Thing

"When the goin' gets tough, the tough get goin'."

The Thing Perseverance

"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."

"Perseverance is the key to success."

"Don't give up on what you believe in."

"I've been through worse."

"You learn to live with the pain."