The sermon explores the relationship between the law and faith, asserting that the law's purpose was not to provide a means of earning righteousness but to reveal humanity's need for grace and to ultimately point towards Christ. Drawing from Galatians 3, the preacher emphasizes the temporary nature of the Mosaic Covenant, highlighting how the law served as a 'tutor' guiding individuals to faith in Jesus, and ultimately demonstrating that the law's purpose was fulfilled with the advent of Christ and the outpouring of the Holy Spirit, marking a transition to a new era of redemptive history.