Who said "Work becomes meaningful when you're doing it for others."?

This quote is attributed to Courage the Cowardly Dog.

Work becomes meaningful when you're doing it for others. - Courage the Cowardly Dog

"Work becomes meaningful when you're doing it for others."

Courage the Cowardly Dog Work

"Courage, the cowardly dog."

"What's wrong, Muriel?"

"Oh, the things I do for love."

"Stupid Eustace!"

"Hard work never killed anybody."

"Work with purpose and integrity."

"Hard work pays off in the end."

"A man's gotta do what a man's gotta do."