The Central Dispute
No issue divides Catholics and Protestants more sharply than the papacy. Catholics believe that Jesus Christ appointed St Peter as the visible head of His Church, and that the Pope is Peter’s successor — inheriting his authority in an unbroken line from the first century to the present. Protestants believe the papacy is a human invention — a gradual accumulation of power that has no basis in Scripture and no warrant from Christ.
The question can be settled only by looking at what the Bible actually says. And the Bible says more than many people — on both sides — realise.
Matthew 16:18 — The Rock
The most important passage is the most direct. At Caesarea Philippi, Jesus asks His disciples who they think He is. Peter answers: “You are the Christ, the Son of the living God.” Jesus responds:
“Blessed are you, Simon Bar-Jona! For flesh and blood has not revealed this to you, but my Father who is in heaven. And I tell you, you are Peter, and on this rock I will build my Church, and the gates of hell shall not prevail against it. I will give you the keys of the kingdom of heaven, and whatever you bind on earth shall be bound in heaven, and whatever you loose on earth shall be loosed in heaven” (Matthew 16:17–19).
Three things happen here that are without parallel elsewhere in the Gospels.
Jesus changes Simon’s name to Peter. In the Bible, a name change signals a new role and a new mission. Abram became Abraham — father of many nations. Jacob became Israel — the father of God’s people. Simon becomes Peter — Petros in Greek, Kepha (Cephas) in Aramaic — meaning “rock.” Jesus is not giving him a nickname. He is defining his role.
Jesus builds His Church on Peter. “On this rock I will build my Church.” Protestant interpreters have long argued that “this rock” refers to Peter’s faith, or to Christ Himself, rather than to Peter personally. But the grammar makes this difficult to sustain. Jesus has just renamed Simon “Rock” and immediately says “on this rock” — the connection is unmistakable. The early Church Fathers overwhelmingly read it as referring to Peter. So did Martin Luther, at least initially, before the implications became uncomfortable.
Jesus gives Peter the keys. The image of the keys is drawn from Isaiah 22:22, where the king of Judah gives the key of his household to a new steward — Eliakim, son of Hilkiah. The steward acts with the king’s authority. He opens and no one shuts; he shuts and no one opens. By giving Peter the keys, Jesus is appointing him as the chief steward of His kingdom — the Church. The authority to “bind and loose” — to make authoritative decisions on doctrine and discipline — is given to Peter alone in this passage. (It is later given to all the Apostles in Matthew 18:18, but Peter receives it first and individually.)
Luke 22:31–32 — The One Who Strengthens
At the Last Supper, Jesus says to Peter: “Simon, Simon, behold, Satan demanded to have you [plural — all the Apostles], that he might sift you like wheat, but I have prayed for you [singular — Peter alone] that your faith may not fail; and when you have turned again, strengthen your brethren.”
The devil attacks all the Apostles. Jesus prays specifically for Peter. And He gives Peter a specific commission: strengthen your brothers. Peter is singled out as the one whose faith will sustain the others — the centre of unity, the point of stability when everything is shaken.
This passage is often overlooked in the papacy debate, but it is profoundly significant. Jesus does not pray for all the Apostles equally. He prays for Peter, and He gives Peter responsibility for the rest.
John 21:15–17 — Feed My Sheep
After the Resurrection, Jesus appears to Peter by the Sea of Galilee and asks him three times: “Do you love me?” Each time Peter says yes. Each time Jesus responds with a commission: “Feed my lambs… Tend my sheep… Feed my sheep.”
The threefold question mirrors Peter’s threefold denial during the Passion — a restoration and a recommissioning. But more than that, it is a pastoral appointment. The sheep belong to Jesus — “my sheep” — but their care is entrusted to Peter. In the ancient world, the shepherd was the leader. To be told “feed my sheep” was to be given authority over the flock.
No other Apostle receives this commission. It is given to Peter alone.
Peter in the Book of Acts
If the papacy were a later invention, you would expect Peter to fade into the background after the Ascension. He does not. In the Book of Acts, Peter dominates the early chapters.
It is Peter who addresses the crowd at Pentecost (Acts 2). It is Peter who performs the first miracle after the Ascension (Acts 3). It is Peter who makes the authoritative decision to admit Gentiles into the Church — the most important decision in early Christian history (Acts 10–11). It is Peter who speaks first at the Council of Jerusalem, and after he speaks, the debate ends (Acts 15:7–12).
Paul, who later becomes the dominant figure in Acts, makes a point of visiting Peter in Jerusalem after his conversion — spending fifteen days with him (Galatians 1:18). The Greek word Paul uses is historēsai — to investigate, to consult, to get the authoritative account. Paul, who had received his gospel by direct revelation from Christ, still found it necessary to consult Peter.
Peter in the Lists of Apostles
Every time the New Testament lists the twelve Apostles, Peter is named first. Matthew’s Gospel makes this explicit: “first, Simon who is called Peter” (Matthew 10:2). The word “first” (prōtos) does not mean first to be called — Andrew was called before Peter. It means first in rank. Peter heads the list because he heads the Apostles.
The Protestant Objection
The most common Protestant response is that even if Peter held a special role, there is no evidence that this role was meant to be passed on to successors.
This objection underestimates the logic of the institution Jesus created. If the Church was to endure until the end of time — and Jesus said it would (Matthew 28:20) — then its leadership must endure with it. A church without a visible head after Peter’s death would be a church Christ left incomplete. The keys were given to an office, not just to a man.
The early Church clearly understood this. By the end of the first century — within living memory of the Apostles — Clement of Rome wrote to the church in Corinth, settling a dispute there with an authority that no other bishop claimed. Clement was the bishop of Rome — Peter’s successor. His intervention was not challenged. It was accepted as authoritative.
By the second century, Irenaeus of Lyon wrote that every church must agree with the church of Rome “on account of its superior origin” — because it was founded by Peter and Paul. By the third century, Cyprian of Carthage wrote that the Chair of Peter is “the principal church, in which priestly unity has its source.”
The papacy did not emerge gradually from a power vacuum. It was exercised from the beginning — because that is what Jesus intended when He gave the keys to Peter and told him to feed His sheep.
The Simple Question
The evidence is not hidden. It is in the Gospels, in Acts, in the letters of Paul, and in the writings of the earliest Church Fathers. The simple question is: what do you do with it?
If Jesus changed Simon’s name to Rock, said He would build His Church on that rock, gave him the keys of the kingdom, prayed specifically for his faith, and commissioned him to feed His sheep — what did He mean, if not that Peter was to lead?
The Catholic answer is the straightforward one: He meant exactly what He said.