You have received the law, and you wished to keep it but were unable to do so. You have fallen through pride, and you realized your weakness. Run to the Physician and wash your face. Long for Christ, confess Christ, and believe in Christ. The Spirit will be added to the letter, and you will be saved. If you take away the Spirit the letter kills, and then what hope will remain? But the Spirit gives life.
Sermon 136, 5