How do we know that Christ is the foundation stone?

1 Peter 2:6 cites the Old Testament, specifically Isaiah 28:16, where the Lord declares His plan to lay a 'chief cornerstone' in Zion. This foundation stone is Christ, chosen by God and precious, symbolizing safety and strength for all who believe. Throughout the New Testament, this theme is echoed, showing Christ as the foundational base upon which the church is built. Just as a solid structure relies on its cornerstone for stability, the church derives its security and identity from Christ, the living stone.