When a person is born again, there is a period of time when he does not have the same vitality in his thinking or reasoning that he previously had. We must learn to express this new life within us, which comes by forming the mind of Christ (see Philippians 2:5). Luke 21:19 means that we take possession of our souls through patience. But many of us prefer to stay at the entrance to the Christian life, instead of going on to create and build our soul in accordance with the new life God has placed within us. We fail because we are ignorant of the way God has made us, and we blame things on the devil that are actually the result of our own undisciplined natures.