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.
28. Therefore we conclude, &c.—It is the unavoidable tendency of dependence upon our own works, less or more, for acceptance with God, to beget a spirit of "boasting." But that God should encourage such a spirit in sinners, by any procedure of His, is incredible. This therefore stamps falsehood upon every form of "justification by works," whereas the doctrine that.
Our faith receives a righteousness
That makes the sinner just,
manifestly and entirely excludes "boasting"; and this is the best evidence of its truth.
Inference second: This and no other way of salvation is adapted alike to Jew and Gentile.