The word happiness is used to indicate at least three related things, which we might roughly call emotional happiness, moral happiness, and judgmental happiness.
Daniel GilbertVariety improves the things that we do too often, but it rules the things that we don't do often enough.
Daniel GilbertYour mistake was not in imagining things you could not know—that is, after all, what imagination is for. Rather, your mistake was in unthinkingly treating what you imagined as though it were an accurate representation of the facts.
Daniel Gilbert