For sin shall not have dominion over you: for you are not under the law, but under grace.
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Ambrosiaster
AD 400
If we walk according to the commandments which he gives, Paul says that sin will not rule over us, for it rules over those who sin. For if we do not walk as he commands we are under the law. But if we do not sin we are not under the law but under grace. If, however, we sin, we fall back under the law, and sin starts to rule over us once more, for every sinner is a slave to sin. It is necessary for a person to be under the law as long as he does not receive forgiveness, for by the law’s authority sin makes the sinner guilty. Thus the person to whom forgiveness is given and who keeps it by not sinning anymore will neither be ruled by sin nor be under the law. For the authority of the law no longer applies to him; he has been delivered from sin. Those whom the law holds guilty have been turned over to it by sin. Therefore the person who has departed from sin cannot be under the law. Commentary on Paul’s Epistles.
It is not that the law is evil but that it makes those under it guilty by giving commands without providing help to fulfill them. In fact, grace helps one to become a doer of the law, for without such grace one living under the law will be no more than a hearer of the law.
This refers to the third state of man, when in his mind he serves the law of God even though his flesh still serves the law of sin. For he does not obey the desire to sin, even though lusts will continue to court him and urge him to surrender until the body is raised to new life and death is swallowed up in victory. Because we do not give in to evil desires we are under grace, and sin does not reign in our mortal bodies. But the man who is controlled by sin even if he wants to resist it is still under the law and not yet under grace.
Quoniam autem qui introducunt indifferentiam, paucas quasdam Scripturas detorquentes, titillanti suae voluptati eas suffragari existimant; rum praecipue ill am quoque: "Peccatum enim vestri non dominabitur; non estis enim sub lege, sed sub gratia; "
You are not under the law of Moses, as some of you were before: but now you are all under grace, or the law of grace, where you may find pardon for your sins. But take care not to abuse this grace of pardon offered you, nor multiply your sins, and defer your conversion, as some may do, by presuming, that after all, by the merits of Christ, you can find pardon. This, says Tertullian, is the greatest ingratitude, to continue wicked, because God is good. Reflect that you make yourselves servants of him whom you obey. By yielding to your passions, you become slaves to sin. If you keep your obedience to the law of Christ, and to his doctrine, the form of which you have delivered to you by the gospel, you are the happy servants of justice, and the servants of God, who is justice itself. (Witham)
Paul says that unless we sink very low, sin will not get the better of us. For it is not just the law which exhorts us but also grace which has remitted our former sins and protects us against future ones.
