If we think of happiness as a way of being, a way of being that gives you the resources to deal with the ups and downs of life, that pervades all the emotional states, including sadness. We think of sadness as incompatible with pleasure, but it’s compatible with what? With altruism, with inner strength, with inner freedom, with sense of direction and meaning in life — those aren’t sad things. But if you don’t fall in despair, still you maintain that wholeness and that sense of purpose and meaning.