Richard Rohr asks this question in his devotional today;

Paul uses a wonderful and telling phrase:  “I no longer live, but Christ lives in me” (Galatians 2:20).

It is a radically different sense of self that he is trying to describe.  Until I have come to that realization myself, I have not been transformed, spiritually speaking.

Contemplative prayer draws us to our True Self, who we are “hidden with Christ in God” as Paul says in Colossians 3:3.  This is the only self that actually exists.  We came forth from God and our deepest DNA is divine. 

We are not human beings trying to become spiritual; we are already spiritual beings and the profound question is always, “What does it mean to be human?”  I believe that is why Jesus came as a human being and consistently called himself a “son of man” more than the Son of God.