The sermon explores the central theme of justification by faith, contrasting it with reliance on works of the law, particularly within the context of Galatians chapter 3. Drawing on Old Testament passages like Habakkuk and Deuteronomy, the preacher emphasizes that true righteousness comes not through adherence to the law but through faith in Christ, who has redeemed believers from the curse and opened the way for them to inherit the blessing of Abraham, including the gift of the Holy Spirit. The message underscores the importance of understanding that the law serves a purpose but does not provide a path to salvation, and that believers are called to trust in Christ's sacrifice and embrace their new status as heirs of God's promises.