3:27 {11} Where [is] boasting then? It is excluded. By what {e} law? of works? Nay: but by the law of faith.
(11) An argument to prove this conclusion, that we are justified by faith without works, taken from the result of justification. The result of justification is the glory of God alone: therefore we are justified by faith without works: for if we were justified either by our own works alone, or partly by faith and partly by works, the glory of this justification would not be wholly given to God.
(e) By what doctrine? Now the doctrine of works has this condition attached to it, that is, if you do, and the doctrine of faith has this condition, that is, if you believe.
3:27 Where [is] boasting then? If we are justified, not by our own righteous works, not by the law of Moses, but as a free gift of God through a law of faith, where is the ground for Jew or Gentile to boast?
3:27 Where is the boasting then of the Jew against the gentile? It is excluded. By what law? of works? Nay - This would have left room for boasting. But by the law of faith - Since this requires all, without distinction, to apply as guilty and helpless sinners, to the free mercy of God in Christ. The law of faith is that divine constitution which makes faith, not works, the condition of acceptance.
3:27-31 God will have the great work of the justification and salvation of sinners carried on from first to last, so as to shut out boasting. Now, if we were saved by our own works, boasting would not be excluded. But the way of justification by faith for ever shuts out boasting. Yet believers are not left to be lawless; faith is a law, it is a working grace, wherever it is in truth. By faith, not in this matter an act of obedience, or a good work, but forming the relation between Christ and the sinner, which renders it proper that the believer should be pardoned and justified for the sake of the Saviour, and that the unbeliever who is not thus united or related to him, should remain under condemnation. The law is still of use to convince us of what is past, and to direct us for the future. Though we cannot be saved by it as a covenant, yet we own and submit to it, as a rule in the hand of the Mediator.