Learn all your life. Learn from your failures. Learn from your successes, When you hit a spell of trouble, ask "What is it trying to teach me?" The lessons aren't always happy ones, but they keep coming. It isn't a bad idea to pause occasionally for an inward look. By midlife, most of us are accomplished fugitives from ourselves."Personal Renewal," by John Gardner (Delivered to McKinsey & Company, Phoenix, AZ, November 10, 1990)
We learn from our jobs, from our friends and families. We learn by accepting the commitments of life, by playing the roles that life hands us (not necessarily the roles we would have chosen). We learn by growing older, by suffering, by loving, by bearing with the things we can't change, by taking risks.
The things you learn in maturity aren't simple things such as acquiring information and skills. You learn not to engage in self-destructive behavior. You learn not to burn up energy in anxiety. You discover how to manage your tensions, if you have any, which you do. You learn that self-pity and resentment are among the most toxic of drugs. You find that the world loves talent, but pays off on character.
You come to understand that most people are neither for you nor against you, they are thinking about themselves. You learn that no matter how hard you try to please, some people in this world are not going to love you, a lesson that is at first troubling and then really quite relaxing.