Certainly, it's a lovely message to pass along, but I think it's an even more important message to give to ourselves.
Thank yourself for something
or tell yourself something that you are particularly proud of having accomplished
Compliment yourself, something that you likely rarely ever do
and give yourself a reason as to why you are bestowing these lovely words on to your heart
Leave yourself with a message of having a fantastic and wonderful day
Then put that letter away. Or better yet, mail it to yourself so that you get it back in a few days. You never know when you will need to read those words and feel gratitude for being who you are.