20 Now this mediator was not a mediator of the new covenant; but there is one mediator of the new covenant, who is Christ, as it is written in the law concerning the promises made to Abraham and his seed. Now Christ is the mediator of life; for this is the promise which God made unto Abraham.
21 Is the law then against the promises of God? God forbid; for if there had been a law given which could have given life, verily righteousness should have been by the law.
22 But the scripture hath concluded all under sin, that the promise by faith of Jesus Christ might be given to them that believe.
23 But before faith came, we were kept under the law, shut up unto the faith which should afterwards be revealed.
24 Wherefore the law was our schoolmaster until Christ, that we might be justified by faith.
25 But after that faith is come, we are no longer under a schoolmaster.
26 For ye are all the children of God by faith in Jesus Christ.
27 For as many of you as have been baptized into Christ have put on Christ.
28 There is neither Jew nor Greek, there is neither bond nor free, there is neither male nor female; for ye are all one in Christ Jesus.
29 And if ye are Christ's then are ye Abraham's seed, and heirs according to the promise.
Galatians 4 Intro: Redemption through Christ -- Sons of God.
