Who said "Gratitude opens doors you didn't know existed."?

This quote is attributed to Tweety.

Gratitude opens doors you didn't know existed. - Tweety

"Gratitude opens doors you didn't know existed."

Tweety Gratitude

"I'm a tweety bird, that's me!"

"Suffering succotash! That's one angry cat."

"Hello, Doc!"

"Be vewy, vewy quiet... I'm hunting wabbits."

"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"