What does it mean that the church's foundation is Christ?

The foundation of the church is fundamentally Christ Himself, as highlighted in Ephesians 2:20, where it states that the church is built upon the foundation of the apostles and prophets, with Christ being the chief cornerstone. This metaphor emphasizes the stability, strength, and essential nature of Christ in the life of the church. Just as a cornerstone provides the critical reference point for the alignment and strength of a structure, Christ provides the foundational truth and purpose for the church. Consequently, its doctrines and practices must align with His teachings and character.