What does the Bible say about Jesus as the cornerstone?

Psalm 118:22 states, 'The stone which the builders refused has become the headstone of the corner.' This verse, quoted multiple times in the New Testament, emphasizes how Jesus, though rejected by many during His earthly ministry, is foundational to the faith and is the cornerstone upon which the Church is built. Martin Luther regarded this psalm as particularly significant, expressing that it captures the essence of divine mercy and grace and the pivotal role of Christ within that framework. The rejection by the builders symbolizes humanity's disregard of Christ's importance, yet God, in His sovereignty, appointed Him as the cornerstone, affirming His central role in salvation history.