“If your metric for the value “success by worldly standards” is “Buy a house and a nice car,” and you spend twenty years working your ass off to achieve it, once it’s achieved the metric has nothing left to give you. Then say hello to your midlife crisis, because the problem that drove you your entire adult life was just taken away from you. There are no other opportunities to keep growing and improving, and yet it’s growth that generates happiness, not a long list of arbitrary achievements.”