Passion and Identity

To me, I sort of see passion and identity connecting to one another, but they are so different. They are both factors that make up up who we are. But I feel as if our identity is given to us from the beginning and that our passions are developed as we grow up. Like Pastor Paul said, as Christians we are sons and daughters of God and our passions are what we have suffered from and what we are willing to suffer for. Our identity (as sons and daughters of God)  seems like a permanent thing while our passions can change along the road.