John Gill preaches about the future personal reign of Christ with the saints on the new earth for a thousand years, emphasizing that this kingdom will be distinct from both the current world and the spiritual reign of Christ. He explains that this glorious and visible kingdom will commence after the resurrection of the just and the removal of all enemies, including Satan. Gill highlights that all saints will share in this reign, experiencing a transformed existence free from sin and death, and will reign with Christ in a state of glory and righteousness. He draws on various biblical prophecies to support the reality of this future kingdom, asserting that it will be established on a renewed earth where Christ will reign as King over all. The sermon concludes with the assurance that this kingdom will not only fulfill God's promises but will also be a time of perfect communion between Christ and His people.