Ken Sande, author of Peacemaker, recently said that Christians often think of the Gospel as two doors. The door of conversion by which we are saved, and the door of heaven, that assures us where we will go when we die.  He went on to say, that many Christians live in between those two doors according to the law.  The Apostle Paul uses the life of Abraham to show us what justification by faith looks like in our lives today.