““Yes, but it doesn’t matter, Csíkszentmihalyi argues. Either way, we experience flow, a state of mind where we are so engaged in an activity that our worries evaporate and we lose track of time. Likewise, Martin Seligman, founder of the positive-psychology movement, discovered that happy people remembered more good events in their lives than actually occurred. Depressed people remembered the past accurately. “Know thyself” may not be the best advice after all. A pinch of self-delusion, it turns out, is an important ingredient in the happiness recipe.””