How do we know Jesus is the cornerstone of the church?

Jesus Himself is referred to as the cornerstone upon which the church is built, as indicated in Matthew 16:16-18. When Peter confesses that Jesus is the Christ, the Son of the living God, Christ responds by stating that upon this rock, He will build His church. This cornerstone imagery signifies that Jesus is foundational to the faith and function of the church. Moreover, the apostle Paul reinforces this truth in Ephesians 2:19-22, depicting the church as a building that is built on the foundation of the apostles and prophets, with Christ Jesus Himself as the cornerstone.