O. ALAN NOBLE, Christianity Today ; How To Practice Gratitude (Even When You Don’t Feel It): Gratitude is more about action than feeling.
"We must often practice and embody gratitude before we feel and experience it in our hearts. The key is choosing to practice gratitude as a habit, not an emotional state. Gratitude may come spontaneously, but more often, it is a habit, choice, and action in response to what we know to be true."