Paul turns to an illustration: the law binds a person only as long as they live. A married woman is bound to her husband while he lives; if he dies, she is free from that law and may marry another. In the same way, believers died to the law through the body of Christ, so that they might belong to another, to him who was raised from the dead, and bear fruit for God. Before, sinful passions, aroused by the law, bore fruit for death; now they serve in the new way of the Spirit and not in the old way of the written code.
Paul asks whether the law is sin and answers no. Through the law he came to know sin: he would not have known what coveting was if the law had not said you shall not covet. Sin seized an opportunity in the commandment and produced in him all kinds of covetousness, and the commandment that promised life proved to be death. The law is holy, and the commandment is holy, righteous and good. The problem is not the law but sin, which used what is good to produce death and show itself as exceedingly sinful.
In verses 14 to 25 Paul speaks in the first person: the law is spiritual, but he is of the flesh, sold under sin. He does not understand his own actions; he does not do what he wants, but the very thing he hates. He agrees that the law is good, and that it is sin dwelling in him that acts. He finds that when he wants to do good, evil lies close at hand. He delights in the law of God in his inner being, but sees another law at work in his members, making him captive. He cries out: wretched man that I am! Who will deliver me from this body of death? And he answers: thanks be to God through Jesus Christ our Lord. He concludes that with his mind he serves the law of God, but with his flesh the law of sin.