29 Or is God the God of Jews only? is he not in the same way the God of Gentiles? Yes, of Gentiles: 30 If God is one; and he will give righteousness because of faith to those who have circumcision, and through faith to those who have not circumcision.
Matthew Henry's Commentary on Romans 3:29-30
Commentary on Romans 3:27-31
(Read Romans 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.