Gratitude is an art which we ought to cultivate. If we were pianists, our songs of thanksgiving would sound like "Chopsticks" when they could play like "Moonlight Sonata" instead. With complaining, however, we can rant with Chopin's finesse. King David and the Amidah prayer teach us how to be grateful with nuance. We need only invert our Faustian griping to turn our curses into prayers.