Galatians 3:19-22 Why then the law? It was added because of transgressions, until the offspring should come to whom the promise had been made, and it was put in place through angels by an intermediary. 20 Now an intermediary implies more than one, but God is one. 21 Is the law then contrary to the promises of God? Certainly not! For if a law had been given that could give life, then righteousness would indeed be by the law. 22 But the Scripture imprisoned everything under sin, so that the promise by faith in Jesus Christ might be given to those who believe.
Here Paul proves that the law was always intended to be a servant to the gospel and not an equal.
1. It was given be an intermediary (Moses and angels who presumably gave it to Moses). But the gospel was fulfilled and preached by Jesus Christ who is Himself the true eternal God!
2. The law can’t give life or righteousness. No law can. Instead the law’s purpose was to imprison all people so that we might receive the promise by faith in Christ! If your salvation is by promise, it is not by law. There is nothing for you to do, nothing for you to add! That means you don’t need to look at your feelings or your life to determine if you are really a Christian. You need look only to the promise of God in Christ – “Your sins are forgiven!”
“My soul no more attempt to draw thy life and comfort from the law. Fly to the hope the gospel gives, the man who trusts the promise lives!”