Who said "Be grateful for small things. They add up to big things."?

This quote is attributed to Hulk.

Be grateful for small things. They add up to big things. - Hulk

"Be grateful for small things. They add up to big things."

Hulk Gratitude

"Hulk is strongest one there is."

"Don't make me angry. You wouldn't like me when I'm angry."

"Puny god."

"Hulk smash!"

"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"