John Owen emphasizes the promise of Christ regarding the church's preservation and the inevitable opposition it faces from the forces of hell. He explains that this opposition manifests through both persecution from the world and heretical teachings that seek to undermine the faith in Christ's person and work. Owen highlights that the church, built upon the foundation of Christ, will endure despite these challenges, as the gates of hell cannot prevail against it. He calls believers to remain steadfast in their faith and to recognize the importance of Christ's dual nature as both God and man, which is essential for the church's foundation. Ultimately, Owen encourages the church to uphold its confession of Christ as the Son of the living God amidst the ongoing spiritual battles.