Citations: Matthew 16:13-20 || Mark 8:27-30 || Luke 9:18-21 Setting: Caesarea Philippi, far north, near Mount Hermon, ~25 miles north of Lake Galilee. A pagan religious center (cave shrine to Pan + temple to Augustus). Choosing THIS location for the confession + church-on-rock declaration is theologically pointed.
The dialogue
Jesus opens (paraphrased across gospels): "Who do men say that the Son of Man is?" / "Who do men say that I am?"
Disciples report popular opinions: John the Baptist (revived); Elijah; Jeremiah; one of the prophets.
Jesus: "But who do you say that I am?"
Peter: "You are the Christ, the Son of the living God." (Matthew's fullest version; Mark + Luke shorter, "You are the Christ" / "the Christ of God")
Jesus's response (Matthew uniquely): "Blessed are you, Simon Bar Jonah, for flesh and blood has not revealed this to you, but my Father who is in heaven. I also tell you that you are Peter, and on this rock I will build my assembly [ἐκκλησία ekklēsia], and the gates of Hades will not prevail against it. I will give to you the keys of the Kingdom of Heaven, and whatever you bind on earth will have been bound in heaven; and whatever you loose on earth will have been loosed in heaven."
Jesus charges all the disciples not to tell anyone he is the Christ.
The Petros / petra wordplay (Matthew 16:18)
The Greek-language wordplay: σὺ εἶ Πέτρος (su ei Petros) "you are Peter" + ἐπὶ ταύτῃ τῇ πέτρᾳ (epi tautē tē petra) "on this rock." Petros (masculine, "rock-piece") vs. petra (feminine, "bedrock"). The exact relationship between Petros + petra has been the center of major Christian denominational division.
Three traditional interpretations
1. Petra = Peter himself (Roman Catholic + Orthodox + many Anglican), Peter IS the rock; the masculine/feminine difference is grammatical convention (you can't call a man by a feminine noun in Greek). The church is built on Peter and his successors. Foundation of papal authority for Catholics.
2. Petra = Peter's confession (most Reformed + many evangelical), Peter as confessing "You are the Christ" is the rock; the church is built on the confession of Christ, not on Peter as a person. Aramaic underlying Jesus's saying would have used kepha (=Cephas, Peter's Aramaic name) for both, but Greek translator distinguished to clarify that the "rock" is the truth Peter spoke, not Peter himself.
3. Petra = Christ himself (some Reformed, esp. Calvin), the rock is Christ, on whom Peter's confession rests. Other NT passages call Christ the rock (1 Corinthians 10:4; Ephesians 2:20).
All three readings are presented here neutrally. The texts can carry any of the three; church history has split on which is normative.
Theological significance
Turning point of the synoptic gospels, Mark + Matthew structure: pre-Caesarea-Philippi = public ministry / parables / Galilee; post-Caesarea-Philippi = passion-prediction journey to Jerusalem. The confession is the pivot from "who is he?" to "what must happen to him?"
Father's revelation, Matthew 16:17: the confession is "flesh and blood has not revealed this to you, but my Father who is in heaven." Reformed reading: regeneration enables saving confession. Catholic + Orthodox: Holy-Spirit prompting (especially for the apostles). All traditions agree the confession is gift-of-God-mediated.
"Keys of the Kingdom" + binding-and-loosing, Matthew 16:19. Variously read: (a) papal authority (RC); (b) apostolic doctrinal authority (Reformed); (c) general church-discipline authority extended to all in Matthew 18:18; (d) gospel-proclamation authority (some evangelical). Different applications. The same authority is reaffirmed to all disciples at Matthew 18:18 + John 20:23.
First passion prediction, immediately following (Matthew 16:21-23 || Mark 8:31-33 || Luke 9:22): "From that time, Jesus began to show his disciples that he must go to Jerusalem and suffer many things…" Peter rebukes Jesus, gets rebuked back ("Get behind me, Satan!"). The encounter shifts from confession-celebration to suffering-prediction in one breath.
Connection to Transfiguration
Six days later (~one week per Matthew 17:1; Mark 9:2; Luke 9:28 says "about eight days"), the Transfiguration. Inner-circle (Peter, James, John) sees Jesus glorified. Father's voice: "This is my beloved Son", confirming Peter's confession./miracles/nature/).