Psychologically rich lives, we argue, not only feel different from happy or meaningful lives. They are psychometrically distinct, with different causes and different longterm outcomes, and can be assessed (both in the moment, and more globally) with different measures. 3/n

Bruce Feiler Life Is in the Transitions: Mastering Change at Any Age

Mihaly Csikszentmihalyi Flow: The Psychology of Happiness

Brian Portnoy The Geometry of Wealth