From the Archives of TGIF 2 Minutes… with an addition on hopefulness.
Bottom line: Being Thankful, Grateful and Hopeful are all positive things.
Simply saying “Thank you” out loud is hard to do without smiling either inwardly or outwardly. Try it! Then say, “I am grateful for X” and it likely brings an even deeper feeling. Perhaps that is why gratitude is central to the science of happiness –yes, there is a whole branch of science around happiness. The newer science around hope is equally, if not more, powerful!