Jesus accepted this confession. The heart of Jesus rejoiced to hear Peter's words. Jesus is the Rock. The rock is a symbol of God. Jesus is the foundation rock upon which His church is built.
Believers are the stones within the construction of the church.
The heart of faith is that Jesus Christ is precisely who He says He is. He is the Son of God. He is our only Savior. Nothing will destroy what He has accomplished. No one can stand in His way.