How do we know that Jesus is the chief cornerstone?

Jesus is identified as the chief cornerstone in several biblical passages, including Ephesians 2:20 and Psalm 118:22. The cornerstone is not only foundational but also determines the structural integrity of God’s spiritual building, which is the church. Jesus fulfilled all requirements of the law and bore our sins, making Him the perfect foundation for salvation. Without Him, there can be no true belief or salvation, affirming His central role as the cornerstone that completes the house of God.