In this sermon, the preacher emphasizes the importance of reflecting Christ's glory through our behavior as a test of genuine faith. He shares his personal experience of encountering Christ and being transformed by the Spirit of God. The preacher highlights the radical change that takes place in believers, both inwardly and outwardly, as they are conformed to the image of Christ. He contrasts the old covenant, characterized by harsh commands and condemnation, with the new covenant of grace, where God provides all that He requires of us. The sermon references Augustine's prayer of "give what you command" and emphasizes the pursuit of God and compliance with His law.