In this sermon, the speaker emphasizes the importance of following the Word of God and not relying solely on personal opinions or experiences. He compares the refining process of sandpaper to the way the Word of God shapes and molds us. The speaker also discusses the need for a method in educating children, rooted in the fear of the Lord. He encourages listeners to be vessels fit for God's use and to strive for maturity in Christ, with the Holy Spirit working mightily in their lives.