Who said "Gratitude is underrated, just like a good Duff."?

This quote is attributed to Barney Gumble.

Gratitude is underrated, just like a good Duff. - Barney Gumble

"Gratitude is underrated, just like a good Duff."

Barney Gumble Gratitude

"Woo-hoo!"

"To alcohol! The cause of, and solution to, all of life's problems."

"I'm gonna go back to the lab and study some... stuff."

"Barney's my name, drinking's my game."

"Gratitude makes life richer."

"A grateful heart is a happy heart."

"Respect those who came before us."

"Life's greatest treasures are the people we love"