In Galatians 3:19, Paul addresses the purpose of the law, stating that it was added because of transgressions until the Seed, to whom the promise was made, should come. This indicates that the Old Covenant, embodied by the law, was a temporary measure necessitated by Israel's failure to adhere to God's eternal principles. Paul explains in verses 23-24 that before faith came, the law served as a guardian, keeping Israel under guard for the faith that would later be revealed, acting as a tutor to bring them to Christ, that they might be justified by faith. Once faith arrived with the coming of Christ, the need for this guardian ceased, as seen in verse 25, where Paul declares that we are no longer under a tutor. He emphasizes in verses 15-18 that the Old Covenant does not annul the earlier covenant made with Abraham, using the terms law and covenant synonymously to show that the Old Covenant was an interim addition to God's enduring promise. Through His sacrifice, Christ redeemed us from the curse of the law, enabling the blessing of Abraham to come upon all through faith, fulfilling the promise of the Spirit as described in verse 14. Thus, the Old Covenant, added because of sin, served its purpose until Christ established a new approach, uniting all as one in Him.