In Galatians 4:21–27, Paul uses the stories of Hagar and Sarah to contrast two ways of relating to God—one through human effort and one through divine promise. Those who depend on their own wisdom and strength find only frustration and bondage, but those who trust God’s promise experience true freedom and joy. The gospel reminds us that freedom is found not in what we do for God, but in what God has done for us in Christ.