Before the coming of this faith, we were held in custody under the law, locked up until the faith that was to come would be revealed. So the law was our guardian until Christ came that we might be justified by faith. Now that this faith has come, we are no longer under a guardian.
But when the set time had fully come, God sent his Son, born of a woman, born under the law, to redeem those under the law, that we might receive adoption to sonship. Because you are his sons, God sent the Spirit of his Son into our hearts, the Spirit who calls out, “Abba, Father.” So you are no longer a slave, but God’s child; and since you are his child, God has made you also an heir.
By creation we are God’s children, but we also need that distinction through the new creation. The law holds us as prisoners to sin, and acted as a guardian, or disciplinarian (NRSV) until Christ came. From that time we are justified by faith, simple faith in Christ Jesus. He came to redeem us from the curse of sin under the law through his crucifixion and death (Galatians 3:13).
Therefore we are God’s children and heirs of all God’s promises in Christ Jesus, since we are children of God in and through the Son of God and again, by his redemptive work for us. We are set free to live in faith and by the Spirit, and not under the law, which ultimately in and of itself would condemn us. Even though it also had its useful place in a formative period for God’s people. We are taught our need for God’s grace, our entry into that coming through faith and baptism in and through the faithfulness of Christ, in and through Jesus Christ himself. Whose coming was timely, according to God’s time and working.