Outgrowing our limitations

W. H. Auden - “Between the ages of twenty and forty we are engaged in the process of discovering who we are, which involves learning the difference between accidental limitations which it is our duty to outgrow and the necessary limitations of our nature beyond which we cannot trespass with impunity.” 

Courtesy: http://www.gretchenrubin.com/happiness_project/2014/08/secret-of-adulthood-accept-yourself-and-expect-more-from-yourself/