Who said "Fear is proof that something matters to you."?

This quote is attributed to Courage the Cowardly Dog.

Fear is proof that something matters to you. - Courage the Cowardly Dog

"Fear is proof that something matters to you."

Courage the Cowardly Dog Fear

"Courage, the cowardly dog."

"What's wrong, Muriel?"

"Oh, the things I do for love."

"Stupid Eustace!"

"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."