Who said "Sometimes you have to be afraid to know you're alive."?

This quote is attributed to Courage the Cowardly Dog.

Sometimes you have to be afraid to know you're alive. - Courage the Cowardly Dog

"Sometimes you have to be afraid to know you're alive."

Courage the Cowardly Dog Life

"Courage, the cowardly dog."

"What's wrong, Muriel?"

"Oh, the things I do for love."

"Stupid Eustace!"

"Life is meant to be lived with passion."

"Life is what happens when you're busy making other plans."

"Life is a journey, not a destination."

"Life's too short for regrets."