Who said "Strength grows from facing what frightens you most."?

This quote is attributed to Courage the Cowardly Dog.

Strength grows from facing what frightens you most. - Courage the Cowardly Dog

"Strength grows from facing what frightens you most."

Courage the Cowardly Dog Strength

"Courage, the cowardly dog."

"What's wrong, Muriel?"

"Oh, the things I do for love."

"Stupid Eustace!"

"Strength comes from within."

"A woman should be proud of who she is."

"A strong woman can overcome anything."

"The only thing I'm good at is killing."