Why is the concept of the cornerstone important for Christians?

For Christians, understanding Jesus as the cornerstone is fundamental because it underscores the importance of relying on Him as the sole foundation for faith and life. As the cornerstone, He stabilizes and aligns our spiritual lives, grounding us in truth and grace. Without Him, all other hopes of salvation are futile, likened to building on shifting sand that cannot withstand the tests of time or judgment. This concept is not only about the individual believer; it encapsulates the entire body of Christ, the church, which is founded upon the apostles' teachings centered around Him. In Christ, believers find their identity as citizens of God's household and heirs of His kingdom.