“Unremitting happiness, of course, is not a possible—or desirable—state. According to the principle of rhythm, there is always an inflow and an outflow, an ebb tide and a flood tide. You’ll always have highs and lows—there’s no way to avoid that. However, your highs will be higher and your lows will be higher. And you’ll find that what is a depressive state for you might be a moderately happy state for someone unaware of the Five Rules of Happiness.”
Josè Silva and Burt Goldman