Self-Renewal
John Gardner in The Road to Self-Renewal:
It is a puzzle why some men and women go to seed, while others remain vital to the very end of their days. And why some people stop learning and growing. One must be compassionate in assessing the reasons: Perhaps life just presented them with tougher problems than they could solve. Perhaps something inflicted a major wound on their confidence or their self-esteem. Perhaps they were pulled down by the hidden resentments and grievances that grow in adult life, sometimes so luxuriantly that, like tangled vines, they immobilize the victim.