The mind has a bad habit when the person lives and works and is surrounded by the world. It builds up barriers, strongholds to protect itself because the world cuts down the person who doesn't conform to the world's way of thinking. The world disheartens and confuses the individual's identity. The mind takes this all in and tries to protect itself from the hurtful news that it doesn't match up to the world's standards, and the mind hides behind walls. The Word of God is every believer's refuge from the world. The mind needs a rest from the world--a rest from the world and its bombardment sinful, dark ways of thinking. The Word is our rest from the world. When the mind has been cleansed from all the trash of the world, then the body can rest. The body will follow the leadings of the mind, whether good or bad. But the strongholds of the mind are still there to remind the believer that he does not fit into the world's mold of how to believe, think, respond, or act. If the mind is deluged by the surrounding flood of darkness and becomes discouraged and depressed, the body will follow by becoming sick or at least nervous. The new believer must begin new habits, one of which is learning who he is in Christ Jesus. Another related to that, is reading and hearing the Word of God daily and strengthening his faith. Faith comes by hearing and hearing by the Word of God (Romans 10.17).