What does it mean that Christ is our cornerstone?

In biblical architecture, a cornerstone was essential for aligning the structure and ensuring stability, which is precisely the role of Christ in the life of believers. As the cornerstone, He sets the direction for the entire building of the Church, and everything is measured against Him. This concept is illustrated in 1 Peter 2:4-6, where Peter indicates that believers are living stones being built upon this cornerstone. Thus, in all matters of faith and practice, our lives are conformed to His image, and our hope of spiritual growth and salvation rests entirely upon Him.