C.H. Spurgeon emphasizes the transformative power of grace through the story of Mary Magdalene, who was possessed by seven demons and found deliverance in Jesus. Her hopeless condition was changed to one of joy and purpose as she became a devoted follower and supporter of Christ. Spurgeon highlights her unwavering faithfulness, being present at the crucifixion and the resurrection, showcasing her deep connection to Jesus. The sermon illustrates how grace can turn despair into hope and make a minister out of a maniac. Spurgeon calls for others to seek such miraculous grace in their own lives.