Who said "Adventure is calling, even if I answer with a whimper."?

This quote is attributed to Courage the Cowardly Dog.

Adventure is calling, even if I answer with a whimper. - Courage the Cowardly Dog

"Adventure is calling, even if I answer with a whimper."

Courage the Cowardly Dog Adventure

"Courage, the cowardly dog."

"What's wrong, Muriel?"

"Oh, the things I do for love."

"Stupid Eustace!"

"The greatest adventure is life itself."

"The adventure of life begins with a single step."

"Adventure finds you when you stop running."

"Fortune and glory, kid."