The ego is as you think of yourself. You in relation to all the commitments of your life, as you understand them. The self is the whole range of possibilities that you've never even thought of. And you're stuck with you're past when you're stuck with the ego. Because if all you know about yourself is what you found out about yourself, well, that already happened. The self is a whole field of potentialities to come through.
Joseph Campbell, The Hero's Journey: Joseph Campbell on His Life & Work
ego, myth, self