Who said "I suppose I should be grateful for what I have."?

This quote is attributed to Charlie Brown.

I suppose I should be grateful for what I have. - Charlie Brown

"I suppose I should be grateful for what I have."

Charlie Brown Gratitude

"Good grief!"

"I got a rock."

"Rats! I did it again."

"Why is it that everything I do turns into a disaster?"

"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"