What does the Bible say about the foundation of the church?

In Isaiah 28:16, God declares that He lays a 'precious cornerstone' in Zion, which refers to Jesus Christ. The New Testament echoes this truth, as seen in 1 Peter 2, where Christ is affirmed as the chief cornerstone of the church. This foundation is crucial because it signifies the established truth upon which believers' faith rests, ensuring unity and solidity within the body of Christ, the church. Spiritual safety and growth come from being built on this solid foundation, as opposed to the unstable ground of human wisdom or works.