The letter of the law kills. You can read and know the bible and still be sick. This is because the law was designed to kill. You need the revelation of God's word for life and healing to manifest in your mortal body. Revelation comes when you invite the Holy Spirit to fill you and when you depend on him to teach you his word. Say, "Precious Holy Spirit, fill me now. Reveal to me the words that I read and study. You are the Spirit of life. I receive your life in Jesus name."