Nothing is inherently and invincibly young except spirit. And spirit can enter a human being perhaps better in the quiet of old age and dwell there more undisturbed than in the turmoil of adventure...
To be at peace with myself means to accept myself the way I am; to reduce the split that is created by the image of what I would like to be and who I really am; to be patient with myself, especially in regard to what conflicts with my idealized self.