This passage follows a very significant moment in the life of Peter. Jesus had asked his disciples, “Who do you say that I am?” Peter replied with the powerful confession: “You are the Christ, the Son of the living God.” In verses 18-19 Jesus responds to Peter’s confession. Jesus declares that on this confession of Peter, Jesus will build His church. In this passage, we see that the church is founded on Jesus, sustained by Jesus, and is the testimony of the gospel.