I have one main thanksgiving-type quote, but it seemed kind of simple and not super weighty or thoughty, so I turned to Google and found some really good ones:
“When I started counting my blessings, my whole life turned around." —Willie Nelson
"Be thankful for what you have; you'll end up having more. If you concentrate on what you don't have, you will never, ever have enough." —Oprah Winfrey
"Piglet noticed that even though he had a Very Small Heart, it could hold a rather large amount of Gratitude." —A.A. Milne
“ ‘Thank you’ is the best prayer that anyone could say. I say that one a lot. Thank you expresses extreme gratitude, humility, understanding.” —Alice Walker
“The roots of all goodness lie in the soil of appreciation for goodness.” —Dalai Lama
“When eating fruit, remember the one who planted the tree.”—Vietnamese Proverb
“Silent gratitude isn’t very much to anyone.”—Gertrude Stein
Humans can be so wise. I'm human, but not always wise. My personal go-to quote is unattributed and unattributable, though I say it almost constantly. And not to put myself anything like on the level of these deep thinkers and talented folks, I'll just sneak it here at the end. Here goes:
"Thank you." --me