How do we know that the Church is built on Christ?

The doctrine that the Church is built upon Jesus Christ is essential in Reformed theology. 1 Corinthians 3:11 clearly declares that no other foundation can be laid except that which is already laid, which is Jesus Christ. This foundational truth is reiterated in Matthew 16:18, where Jesus Himself states, 'Upon this rock I will build My Church.' This metaphor underscores that Christ is not only the builder but also the very foundation of the Church. This certainty reinforces believers' confidence, knowing that the Church, built upon Christ, will withstand the trials and adversities faced in the world.