This sermon emphasizes the imperative for preachers to focus exclusively on Jesus Christ rather than human achievements or moral duties. It highlights the Holy Spirit's role as the divine revealer who guides believers into the truth of Christ and regenerates souls through faith. The speaker contrasts modern preaching trends with the apostolic model found in Scripture, where the gospel is defined by the person and work of Christ. Key passages illustrate that true ministry glorifies Jesus by proclaiming His death, resurrection, and intercession without relying on worldly methods or self-promotion. Ultimately, the message calls for a return to centering all teaching on the sufficiency and supremacy of Christ for salvation.