A bestseller since it was first published, Phases describes each period of life - adolescence, the twenties, thirties, forties, etc. - and looks at the inner qualities and challenges that arise at each stage. The author argues that the various biological and psychological explanations of the human being are incomplete. If the inner self, the ego, of each individual is recognized and acknowledged, then the peculiarities of one’s particular life-path and its challenges take on new meaning.