For all but the most conceited or desperately insecure, it seems that you get wiser as you age, and that wisdom and humility go hand in hand. I know it isn’t that simple, and I know some older people are far from humble. But it seems to me that life is a kind of boot camp, designed to break you down and build you up in a different way—if you let it. So you lose your ability to sprint a hundred yards, but maybe you gain something more important in the process.