How do we know Christ's role as Cornerstone is true?

The certainty of Christ’s role as the Cornerstone is rooted in prophetic fulfillment and New Testament revelation. Psalm 118:22 foreshadows Christ's rejection by the builders and His eventual exaltation as the chief Cornerstone, confirmed in the New Testament (Matthew 21:42, Acts 4:11). This metaphor draws attention to His divine authority and unique position as the source of stability for the Church. Consequently, believers are reassured that Christ’s strength undergirds their faith, as He unites and preserves the body of Christ, emphasizing His essential role through various scriptural affirmations.