John Gill preaches about the future glory of the Church in the latter days, emphasizing the significant spiritual reign of Christ and the eventual personal reign that will follow. He highlights the destruction of antichrist, the spread of the gospel, and the large-scale conversions that will occur, including the return of the Jewish people to faith in Christ. Gill assures that the Church, founded on Christ, will endure and flourish, filled with holiness, brotherly love, and divine presence. He encourages believers to remain hopeful and steadfast, as the glorious promises of God will be fulfilled.