John Gill expounds on 1 Peter 2:4, emphasizing that Christ is the living stone, the true foundation of the church, contrasting Him with the rejected stone by the Jewish leaders. He highlights that while many disallowed Christ, He is chosen and precious in the sight of God, serving as the source of life and salvation for believers. Gill explains that coming to Christ means a continual exercise of faith, recognizing Him as the only foundation for hope and righteousness. The sermon underscores the importance of relying on Christ for spiritual sustenance and eternal life, despite the world's rejection. Ultimately, Christ's value is immeasurable, both to God and to those who believe in Him.