This idea of selfishness as a virtue, as opposed to generosity: That, to me, is unnatural.
The actor cannot afford to look only to his own life for all his material nor pull strictly from his own experience to find his acting choices and feelings.
One likes to think one grows as a writer as one ages, else all you get is an 'old' young writer. Beyond that is the changing landscape of the universe and the stories I choose to tell.

