But Christ has rescued us from the curse pronounced by the law. When he was hung on the cross, he took upon himself the curse for our wrongdoing. For it is written in the Scriptures, "Cursed is everyone who is hung on a tree."
References for Galatians 3:13
Through the work of Christ Jesus, God has blessed the Gentiles with the same blessing he promised to Abraham, and we Christians receive the promised Holy Spirit through faith.
Dear brothers and sisters, here's an example from everyday life. Just as no one can set aside or amend an irrevocable agreement, so it is in this case.
References for Galatians 3:15
God gave the promise to Abraham and his child. And notice that it doesn't say the promise was to his children, as if it meant many descendants. But the promise was to his child -- and that, of course, means Christ.
References for Galatians 3:16
This is what I am trying to say: The agreement God made with Abraham could not be canceled 430 years later when God gave the law to Moses. God would be breaking his promise.
For if the inheritance could be received only by keeping the law, then it would not be the result of accepting God's promise. But God gave it to Abraham as a promise.
Well then, why was the law given? It was given to show people how guilty they are. But this system of law was to last only until the coming of the child to whom God's promise was made. And there is this further difference. God gave his laws to angels to give to Moses, who was the mediator between God and the people.
Now a mediator is needed if two people enter into an agreement, but God acted on his own when he made his promise to Abraham.
Well then, is there a conflict between God's law and God's promises? Absolutely not! If the law could have given us new life, we could have been made right with God by obeying it.
But the Scriptures have declared that we are all prisoners of sin, so the only way to receive God's promise is to believe in Jesus Christ.
Until faith in Christ was shown to us as the way of becoming right with God, we were guarded by the law. We were kept in protective custody, so to speak, until we could put our faith in the coming Savior.