What does it mean that the Church is built upon the rock?

The declaration of Jesus that 'upon this rock I will build my church' (Matthew 16:18) emphasizes that the Church's foundation is not on Peter or any mere man, but on Christ Himself—the rock of our salvation. This metaphor of a rock signifies stability, strength, and endurance, indicating that the Church stands firm against opposition and the gates of hell. The Church comprises the elect and is sustained by Christ as the living cornerstone (1 Peter 2:4-5). Ephesians 2:19-20 elaborates that believers are members of God's household, built on the foundation of the apostles and prophets with Christ as the chief cornerstone. Thus, recognizing Christ as the foundation solidifies our faith and ensures that the Church is ever-growing through His divine guidance.