3:27. Where is then thy boasting? It is excluded. By what law? Of works? No, but by the law of faith.
3:28. For we account a man to be justified by faith, without the works of the law.
By faith, etc... The faith, to which the apostle here attributes man's justification, is not a presumptuous assurance of our being justified; but a firm and lively belief of all that God has revealed or promised. Heb. 11. A faith working through charity in Jesus Christ. Gal. 5.6. In short, a faith which takes in hope, love, repentance, and the use of the sacraments. And the works which he here excludes, are only the works of the law: that is, such as are done by the law of nature, or that of Moses, antecedent to the faith of Christ: but by no means, such as follow faith, and proceed from it.
3:29. Is he the God of the Jews only? Is he not also of the Gentiles? yes, of the Gentiles also.
3:30. For it is one God that justifieth circumcision by faith and uncircumcision through faith.
3:31. Do we then, destroy the law through faith? God forbid! But we establish the law.
Romans Chapter 4
Abraham was not justified by works done, as of himself, but by grace and by faith. And that before he was circumcised. Gentiles, by faith, are his children.
4:1. What shall we say then that Abraham hath found, who is our father according to the flesh?
4:2. For if Abraham were justified by works, he hath whereof to glory, but not before God.