As King Solomon said, "there is a time for everything;" and as the Baal Shem Tov said, "without moments of degradation we will not have moments of inspiration" for it’s the darkness that causes the yearning for light, and practically, we must sleep, and during sleep we sort of degrade ourselves, because when we wake up, we know we’ve wasted 8 hours! this inspires us to do something spiritual, hence we must pray, we must thank-God, we must study Torah and then we must make the world a better place; we must eat, we must love, and we must continue infinitely in this cycle