Unfortunately, today there seem to be so many people serving the great I was. But that is not how God revealed Himself to Moses. God revealed Himself as the great I AM. God is working and moving NOW in the present, not just in past history. The problem with faith is that God confirms His Promise to us after we step out in obedience, not before. So we will never fully see the result of God's Promise until we fully step out in obedience to His Word.