In this sermon, the preacher focuses on the passage in John 1:19-51. The sermon is divided into three main points. The first point discusses John the Baptist and his interrogation by the delegation sent from Jerusalem. John identifies himself as not being the Christ, Elias, or the prophet. He declares himself as the voice crying in the wilderness, preparing the way for the Lord. The second point explores how John testifies of Christ as the Lamb of God, who takes away the sins of the world. John came with a baptism of repentance to give light to those living in darkness and under the law. The third point looks at Jesus' first disciples, Andrew and Simon Peter, who were introduced to Jesus by John. They immediately recognized Jesus as the Messiah and followed Him. The sermon emphasizes the importance of recognizing Jesus as the Lamb of God and following Him as His disciples.