The following quotations about gratitude are my favorites from the 50 at this website:

“No one who achieves success does so without the help of others. The wise and confident acknowledge this help with gratitude.” – Alfred North Whitehead

“He is a wise man who does not grieve for the things which he has not, but rejoices for those which he has.” – Epictetus

“Gratitude unlocks the fullness of life. It turns what we have into enough, and more. It turns denial into acceptance, chaos to order, confusion to clarity. It can turn a meal into a feast, a house into a home, a stranger into a friend.” ― Melody Beattie

“I looked around and thought about my life. I felt grateful. I noticed every detail. That is the key to time travel. You can only move if you are actually in the moment. You have to be where you are to get where you need to go.” – Amy Poehler