"What then shall we say that Abraham, our forefather according to the flesh, discovered in this matter? If, in fact, Abraham was justified by works, he had something to boast about—but not before God. What does Scripture say? “Abraham believed God, and it was credited to him as righteousness.” Now to the one who works, wages are not credited as a gift but as an obligation. However, to the one who does not work but trusts God who justifies the ungodly, their faith is credited as righteousness."
Reflection. St Paul has realised something profound. Salvation by faith has always been God's plan, purpose and position. Paul understands that God is and has always been the God of grace. Paul has the wonderful understanding of the heart of the Gospel: we cannot earn our righteousness, but it is credited to us simply by our believing and trusting in God and not by anything we do - just as for Abraham. If you want to read more of this from the saint, have a look at Ephesians chapter 2.
Prayer. Lord Jesus, thank you for making the grace of God so freely available. Amen.