Justification by Faith

But now apart from the Law the righteousness of God has been revealed, being witnessed by the Law and the Prophets, but it is the righteousness of God through faith in Jesus Christ for all those who believe; for there is no distinction, for all have sinned and fall short of the glory of God, being justified as a gift by His grace through the redemption which is in Christ Jesus, whom God displayed publicly as a propitiation in His blood through faith. This was to demonstrate His righteousness, because in God’s merciful restraint He let the sins previously committed go unpunished; for the demonstration, that is, of His righteousness at the present time, so that He would be just and the justifier of the one who has faith in Jesus.

Where then is boasting? It has been excluded. By what kind of law? Of works? No, but by a law of faith. For we maintain that a person is justified by faith apart from works of the Law. Or is God the God of Jews only? Is He not the God of Gentiles also? Yes, of Gentiles also, since indeed God who will justify the circumcised by faith and the uncircumcised through faith is one.

Do we then nullify the Law through faith? Far from it! On the contrary, we establish the Law. 

Romans 3:21-31 (NASB)