John Gill preaches on the significance of Solomon's Temple as a representation of the Church, emphasizing the two pillars, Jachin and Boaz, which symbolize Christ. He explains that Jachin, meaning 'He shall establish,' signifies God's promise to establish His Church and believers, while Boaz, meaning 'In Him is strength,' represents the strength found in Christ. Gill draws parallels between the temple's structure and the spiritual body of believers, highlighting the importance of being part of the Church as a pillar of truth and support. He encourages the congregation to rely on Christ for strength and stability in their faith, assuring them that true believers are established and upheld by Him. The sermon concludes with a call to trust in the Lord for everlasting strength and to recognize Christ as the foundation of their faith.