Is salvation merely an intellectual endeavor that begins and ends with the mind or does it include the heart? In this sermon on Romans 10:9–10 titled “A Change of Heart,” Dr. Martyn Lloyd-Jones examines what the apostles preached in their missionary journeys and what true salvation looks like. Throughout the New Testament, the apostles preach that saving faith is not only in the mind, but that it must include a change of heart. In the Old Testament, God promises to change the heart of stone into a heart of flesh. The question now is not whether or not the mind believes, but if the heart believes that Jesus is Lord. In today’s age many believe that one must only make a decision in order to be saved. Yet if this decision does not stem from a heart burdened by sin and seeking repentance from God, then it is not saving faith. Dr. Lloyd-Jones shows the hope of salvation that can only be given by God through the Son, a salvation that is so miraculous it changes a wicked heart into one that loves God.