In this sermon, the preacher emphasizes the importance of receiving the provision of salvation through Jesus Christ in order to have a relationship with God and enter His kingdom. He highlights that trying to establish our own righteousness will not lead to being a part of God's kingdom. The preacher urges listeners to give their lives to Jesus Christ and draw closer to their Creator. He also discusses the role of the law in driving us to Jesus and the concept of identification and substitution in the Old Testament sacrificial system.