There are different types of wounds which need healing. Different types of illness including spiritual sickness. All of these Holy Spirit is interested in healing progressively. He is looking for you to turn to Him and stay with Him awhile, so He can work on your spirit, soul, mind, heart and body.  These songs help you do just that. And amazingly, as you make the sacrifice of time to concentrate on Him using the songs, He will etch the lyrics on your mind and heart so that as you are healing, you are also immediately strengthened. With His peace. With His joy. In the midst. Until you are more healed. And then until heaven.