John Gill emphasizes the certainty and significance of the Second Coming of Christ, detailing how it will precede the resurrection of the just and the establishment of His kingdom. He explains that Christ's return will be marked by great glory and will fulfill prophecies from the patriarchs and prophets, confirming its inevitability. Gill highlights the dual nature of Christ's coming, both in judgment and in the establishment of His reign, and encourages believers to remain vigilant and prepared for this event. He also discusses the signs that will precede His return and the ultimate purpose of His coming, which includes the full realization of salvation for the saints and the destruction of evil. The sermon serves as a reminder of the hope and expectation that believers should hold regarding Christ's return.