There is another movement which should constantly accompany devotion…. That kind of sense of gratitude that the Divine exists; that feeling of a marvelling thankfulness which truly fills you with a sublime joy at the fact that the Divine exists, that there is something in the universe which is the Divine, that it is not just the monstrosity we see, that there is the Divine, the Divine exists. And each time that the least thing puts you either directly or indirectly in contact with this sublime Reality of divine existence, the heart is filled with so intense, so marvellous a joy, such a gratitude as of all things has the most delightful taste.
There is nothing which gives you a joy equal to that of gratitude. One hears a bird sing, sees a lovely flower, looks at a little child, observes an act of generosity, reads a beautiful sentence, looks at the setting sun, no matter what, suddenly this comes upon you, this kind of emotion—indeed so deep, so intense—that the world manifests the Divine, that there is something behind the world which is the Divine.
So I find that devotion without gratitude is quite incomplete, gratitude must come with devotion.
Ref : Questions and Answers 1956