What is the significance of Christ as the cornerstone?

The cornerstone symbolizes Christ's primacy and the integrity of the church’s foundation. In Ephesians 2:20, Paul notes that the church is built on the foundation of the apostles and prophets, with Christ Himself as the chief cornerstone. This highlights the necessity of centering all teachings, preaching, and church practices on Christ alone. Any building that diverges from this cornerstone undermines the church’s unity and mission. It is in Christ that all believers find their identity and purpose, making Him essential to the church's existence.