" Underlying it all is the happiness delusion. As the Buddha emphasized, our ongoing attempts to feel better tend to involve an overestimation of how long “better” is going to last. What’s more, when “better” ends, it can be followed by “worse”—an unsettled feeling, a thirst for more. Long before psychologists were describing the hedonic treadmill, the Buddha saw it. "

― Robert Wright , Why Buddhism is True: The Science and Philosophy of Meditation and Enlightenment