Why is Christ referred to as the cornerstone of faith?

Ephesians 2:20 describes Christ as 'the chief cornerstone.' This metaphor signifies that just as a cornerstone is foundational for a building, Jesus is critical to the structure of Christian faith. Without Him, the faith collapses. The cornerstone imagery also illustrates the unity of believers in Christ, as it is through Him that all believers are intimately connected to God and each other. Understanding Christ as the cornerstone aids believers in recognizing the importance of their relationship with Him, as all spiritual blessings are found in Him alone.