Read Matthew 16:18–20
Questions from the Scripture text: Who is speaking to whom in Matthew 16:18? What does He name him? What does He say He is going to build? Upon what? What won’t prevail against it? What will Jesus give to him (Matthew 16:19)? What will he do on earth? What will have been done to it, already, in heaven? What else will he do on earth? What will already have been done to that in heaven? Whom does Jesus now command (Matthew 16:20)? That they not do what?
What is the foundation of the church? Matthew 16:18–20 prepares us for the sermon in the morning public worship on the coming Lord’s Day. In these three verses of Holy Scripture, the Holy Spirit teaches us that Jesus Himself, as confessed by the apostles to be Christ and God, is the only foundation of the church.
Jesus has asked the disciples (plural, Matthew 16:15) Who they say that He is. Simon, speaking for the group, has answered that He is the Christ, the Son of the Living God (Matthew 16:16).
Now, Jesus offers a play on words. He calls Simon “Peter” (Petros), but then refers to “this rock” (petra). What is the rock upon which Jesus will build His church? Ultimately, the answer is not “Peter” but “Jesus.” Even here, we can plainly see that He calls the church “My church.”
But, the Spirit also answers this question in other places. The household of God is “built on the foundation of the apostles and prophets, Jesus Christ Himself being the chief cornerstone” (cf. Ephesians 2:19–20, 1 Corinthians 3:11, Revelation 21:14).
Some have made the mistake of thinking that Jesus was establishing Peter himself as the foundation. But He Himself initiated this conversation about what the apostles say about Jesus. This is the foundation: the apostolic witness to Jesus’s Christhood and Godhood. Christ Himself is the chief cornerstone, and the foundation of the church is the apostolic witness to Who He is.
A foundation is necessary, because the church will be under attack. The gates were the place of public discourse and government. All of the counsels and influence of Hell itself are bent on destroying the church (cf. Genesis 3:15; Revelation 12:13–17). But the church is built upon the testimony of Who Jesus is: “Who do ye [apostles] say that I am?” (Matthew 16:15). They overcome by the blood of the Lamb and the word of their testimony, and by not loving their lives to the death (cf. Revelation 12:11).
And the foundation holds because of Who is building upon it! The Lord Jesus Himself. It’s His church. He is the One building upon it. And the foundation of it is the confession of Who He is.
It would be a travesty to take this passage and make Peter the foundation, as if Jesus were ordaining some sort of first pope. Although Peter is privileged, both here and in Acts 2, with making an initial and remarkable confession of the Lord Jesus, he is not the leader of the church in its first general assembly in Acts 15 and has to be openly rebuked by Paul in Galatians 2:14. To take a passage (and a church) that is all about Christ, and attempt to make it about Peter is surely the spirit and pattern of antichrist.
That said, just like confessing Christ must be done individually; so, also, individual church officers must confess Christ and exercise the keys of the kingdom. What Jesus is saying about Himself and His church applies personally, individually to Peter, as he confesses Christ—just as it applies to each apostle and elder. They are to confess that which has been revealed from heaven (cf. Matthew 16:17b), because this is the first and great way in which they open and shut the kingdom to those for whom this has already been done in heaven. Matthew 16:19 more literally says “will have been bound” and “will have been loosed,” indicating that heavens determinations govern the earthly results in the ministry of those who preach Christ. This is not license for church officers to bend the church according to their will, but rather a heavenly mandate that they preach and practice only according to God’s expressed will in Scripture.
That this is primarily what is mean by the keys is confirmed in Matthew 16:20. The kingdom is not yet open to the nations, and so the foundational confessors of Christ (the disciples) are not yet to tell people that He is Jesus the Christ. The day will come when the kingdom is open, and then the keys of the preaching of the gospel will be employed on earth to open it to those who are being brought in. Isn’t that wonderful to know, dear reader? Whenever the gospel is preached to us by Christ’s ordained officer, he is taking Jesus’s own keys, and putting them into the doors of heaven to open them for us. But, let us seek that God would reveal Jesus to us from heaven, because the sobering reality is that this same preaching shuts heaven up against those who refuse the gospel of Jesus Christ.
How is the identity of Jesus foundational to your Christian life? How is it evident that it is foundational to your church’s ministry (or, perhaps, do you need to go to a true church, instead)? What is happening when your elders or pastor are preaching the gospel of Jesus as the Chris to you? How can you come to respond rightly? What would that response look like?
Sample prayer: Lord, thank You for revealing to us from heaven what flesh and blood could never discover: that Jesus is the Christ, the Son of God. Grant that by Your grace in Your ordained servants, heaven would be opened to us week by week in the preaching of the gospel. And, grant that by Your grace to us, we would enter the open door by faith in Jesus Christ, through Whom also we ask this, AMEN!
Suggested songs: ARP110B “The LORD Has Spoken to My Lord” or TPH332 “Songs of Thankfulness and Praise”