The Secret of Saying Thanks

The Secret of Saying Thanks by Douglas Wood, illustrated by Greg Shed, 2005, ISBN 978-0-689-85410-1
The author tells us that the "world is full of secrets,...and the best secrets are the ones that make us happy..." he goes on to tell us how we might discover the secret of happiness as he ponders each small, seemingly insignificant part of our day. Things like the sun, or a flower, or an old tree that provides shade. Hopefully, we realize that these things are not insignificant, and that we should offer thanks for these small things each day. In doing so, we will discover the key to happiness.
The author relates the act of giving thanks to the state of being happy. This book is the source of the famous quote:
"We don't give thanks because we are happy.
We are happy because we give thanks."