Gratefulness is not just saying "thank you." It's acting. It is being yourself. A mother is grateful, shows gratefulness by mothering, a scientist by doing science.
David Steindl-RastEverything is a gift. The degree to which we are awake to this truth is a measure of our gratefullness, and gratefullness is a measure of our aliveness.
David Steindl-RastThe greatest gift one can give is thanksgiving. In giving gifts, we give what we can spare, but in giving thanks we give ourselves.
David Steindl-Rast