Was Peter the First Pope? The Bible on the Rock and the Keys

"Show me the pope in the Bible." Fair challenge. If the papacy is real, Scripture should point to it. So let's open the Bible.

Short answer: Yes. The papacy is biblical. Jesus renamed Simon "Rock," promised to build His Church on him, gave him alone the keys to the kingdom, and charged him to strengthen his brothers and feed his sheep. That is an office. In Isaiah 22 the key of the House of David passes from Shebna to Eliakim, and when Judas falls, St. Peter applies the Psalm: "May another take his office" (Acts 1:20). In Scripture, an office outlives the man who holds it.

Key verses on the papacy

• "And so I say to you, you are Peter, and upon this rock I will build my church" (Matthew 16:18)
• "I will give you the keys to the kingdom of heaven" (Matthew 16:19)
• "I will place the key of the House of David on his shoulder" (Isaiah 22:22)
• "I have prayed that your own faith may not fail... you must strengthen your brothers" (Luke 22:32)
• "Feed my sheep" (John 21:17)

Scripture quotations are from the New American Bible, Revised Edition (NABRE), © 2010, 1991, 1986, 1970 Confraternity of Christian Doctrine, Washington, D.C. Used by permission. All rights reserved.

What Catholics Actually Teach

The Church teaches Petrine primacy: Christ made St. Peter the visible head of the apostles, and that office passes to St. Peter's successors, the bishops of Rome. "Simon Peter holds the first place in the college of the Twelve" (CCC 552). "The Lord made Simon alone, whom he named Peter, the 'rock' of his Church" (CCC 881). The "power of the keys" means "authority to govern the house of God, which is the Church" (CCC 553). St. Peter's successor, "by reason of his office as Vicar of Christ," holds "full, supreme, and universal power over the whole Church, a power which he can always exercise unhindered" (CCC 882). That power is Christ's, entrusted to a steward; it is not the pope's own. Yet the bishops are not his deputies: they "should not be thought of as vicars of the Pope" (CCC 895), and with him at their head they form one college (CCC 880, 883).

What Catholics do not teach:

• That the pope replaces Christ. The pope is the Vicar of Christ (CCC 882), His representative, not His replacement. Christ is the King; St. Peter is His steward.
• That the pope cannot sin. Infallibility is not impeccability. Popes go to confession.
• That everything a pope says is infallible. Infallibility applies only when, "as supreme pastor and teacher of all the faithful," he proclaims "by a definitive act a doctrine pertaining to faith or morals" (CCC 891). Interviews, opinions, and personal conduct are not covered. Not infallible does not mean optional, though: when he teaches on faith and morals through the ordinary Magisterium, Catholics owe "religious assent" (CCC 892).

The Biblical Case

1. Matthew 16: the rock, the keys, binding and loosing

"And so I say to you, you are Peter, and upon this rock I will build my church, and the gates of the netherworld shall not prevail against it. I will give you the keys to the kingdom of heaven. Whatever you bind on earth shall be bound in heaven; and whatever you loose on earth shall be loosed in heaven." (Matthew 16:18–19)

St. Peter confesses, "You are the Messiah, the Son of the living God" (Matthew 16:16). Jesus answers with three promises, all addressed to St. Peter in the singular:

1. The rock. Jesus spoke Aramaic, and St. John preserves the name He gave: "you will be called Cephas" (John 1:42), from Kepha, "rock." St. Paul calls him Cephas too (1 Corinthians 15:5; Galatians 1:18; 2:9). That Aramaic name, kept untranslated in the Greek New Testament, shows the play on words: the man Jesus named Rock is the rock on which He builds.
2. The keys. Not "a key," but "the keys to the kingdom," a symbol of governing authority straight out of the Old Testament.
3. Binding and loosing. Authoritative decisions on earth, ratified in heaven.

2. Isaiah 22: keys belong to an office with successors

Jesus' words echo Isaiah 22. God removes Shebna, the royal steward and "master of the palace" (Isaiah 22:15), and gives his office to Eliakim:

"I will clothe him with your robe, gird him with your sash, confer on him your authority. He shall be a father to the inhabitants of Jerusalem, and to the house of Judah. I will place the key of the House of David on his shoulder; what he opens, no one will shut, what he shuts, no one will open." (Isaiah 22:21–22)

Notice:

• The key means delegated royal authority ("confer on him your authority").
• The steward is a father to the people. ("Pope" comes from papa, father.)
• He opens and shuts, the pattern of binding and loosing.
• The office has successors. Shebna is thrust "from your office" (Isaiah 22:19), and Eliakim takes it; later he is "Eliakim, son of Hilkiah, the master of the palace" (2 Kings 18:18).

Jesus, the Son of David, holds "the key of David" (Revelation 3:7). Like the kings of Judah, He appoints a steward over His household and hands him the keys. That is Matthew 16:19.

3. Luke 22: "strengthen your brothers"

"Simon, Simon, behold Satan has demanded to sift all of you like wheat, but I have prayed that your own faith may not fail; and once you have turned back, you must strengthen your brothers." (Luke 22:31–32)

In Greek, Satan's "you" is plural (the NABRE spells it out: "all of you"): all the apostles would be sifted. But "your own faith" is singular. Jesus prays for St. Peter's faith and makes him responsible for strengthening the rest. A seventh-century ecumenical council read the verse the same way: the Third Council of Constantinople (680–681) received the letter of Pope St. Agatho, who grounded Rome's fidelity in this very prayer (Letter to the Emperor), and acclaimed, "Peter spoke through Agatho" (Prosphoneticus to the Emperor).

4. John 21: shepherd of the whole flock

After the Resurrection, Jesus asks St. Peter three times, "Do you love me?" and three times commissions him: "Feed my lambs... Tend my sheep... Feed my sheep" (John 21:15–17). The sheep remain Christ's; the shepherding is entrusted to St. Peter (cf. John 10:11; CCC 553).

5. St. Peter is always first

• Every apostle list names St. Peter first. St. Matthew says it outright: "first, Simon called Peter" (Matthew 10:2).
• St. Peter is named far more often than any other apostle, well over 150 times by common counts (as Simon, Peter, or Cephas).
• Jesus teaches the crowds from St. Peter's boat (Luke 5:3) and pays the temple tax with one coin "for me and for you" (Matthew 17:27). No other apostle is joined to Jesus like that.
• The angel at the tomb says, "But go and tell his disciples and Peter" (Mark 16:7). The risen Lord appears to St. Peter before the Twelve: "The Lord has truly been raised and has appeared to Simon!" (Luke 24:34); "he appeared to Cephas, then to the Twelve" (1 Corinthians 15:5).
• St. Peter travels, "passing through every region" (Acts 9:32), and when he is imprisoned, "prayer by the church was fervently being made to God on his behalf" (Acts 12:5).

6. Acts: St. Peter leads

• Replacing Judas: "Peter stood up in the midst of the brothers" and directs the process (Acts 1:15–26).
• Pentecost: "Peter stood up with the Eleven, raised his voice" and preaches the first Christian sermon (Acts 2:14).
• Discipline: St. Peter pronounces judgment on Ananias and Sapphira (Acts 5:1–11).
• The Gentiles: God sends St. Peter to Cornelius, and St. Peter commands that the Gentiles be baptized (Acts 10:47–48). When "the circumcised believers confronted him," St. Peter "explained it to them step by step," and "they stopped objecting" (Acts 11:2, 4, 18).
• Council of Jerusalem: "After much debate had taken place, Peter got up" and gave the decisive word: "we are saved through the grace of the Lord Jesus, in the same way as they" (Acts 15:7–11). "The whole assembly fell silent" (Acts 15:12), and St. James's ruling opens by building on St. Peter's: "Symeon has described how God first concerned himself with acquiring from among the Gentiles a people for his name" (Acts 15:13–14). The decision then goes out from "the apostles and the presbyters" (Acts 15:22–23).

7. St. Paul visits St. Peter

"Then after three years I went up to Jerusalem to confer with Cephas and remained with him for fifteen days" (Galatians 1:18).

8. St. Peter in Rome

"The chosen one at Babylon sends you greeting, as does Mark, my son" (1 Peter 5:13). "Babylon" was an early Christian code name for Rome (compare Revelation 17–18), and early writers place St. Peter's ministry there (see St. Irenaeus below). St. Peter calling himself "a fellow presbyter" (1 Peter 5:1) is humility, not a denial of his office.

9. Succession is built in

• When Judas falls, St. Peter applies Psalm 109: "May another take his office" (Acts 1:20). The Greek is episkopē, the root of "episcopal." The office outlives the man, so St. Matthias fills it (Acts 1:25–26).
• "And what you heard from me through many witnesses entrust to faithful people who will have the ability to teach others as well" (2 Timothy 2:2). Four generations of handing on.
• "I left you in Crete so that you might set right what remains to be done and appoint presbyters in every town, as I directed you" (Titus 1:5).

Objections Answered

(a) "Petros is a small stone; petra is a big rock."

At its strongest: St. Matthew wrote Petros for St. Peter and petra for "this rock." In older Greek, petros can mean a stone and petra a mass of rock. Why switch words if Jesus meant St. Peter?

Answer: Petra is feminine; a man's name needed the masculine Petros. The stone-versus-rock distinction belongs mostly to older, often poetic Greek, and the two words overlapped in New Testament usage. Above all, Jesus spoke Aramaic, and Scripture preserves His word: Kepha (John 1:42), one word for both. And Jesus says "and upon this rock," not "but."

(b) "The rock is Peter's confession, or Christ Himself."

At its strongest: St. Paul writes that "no one can lay a foundation other than the one that is there, namely, Jesus Christ" (1 Corinthians 3:11), and that "the rock was the Christ" (1 Corinthians 10:4).

Answer: Scripture uses building images more than one way. Christ is the ultimate foundation, yet the Church is "built upon the foundation of the apostles and prophets, with Christ Jesus himself as the capstone" (Ephesians 2:20), and the New Jerusalem's wall "had twelve courses of stones as its foundation, on which were inscribed the twelve names of the twelve apostles of the Lamb" (Revelation 21:14). Christ can make St. Peter a foundation under Himself.

As for the confession, it is both/and: "Because of the faith he confessed Peter will remain the unshakeable rock of the Church" (CCC 552). But the text points to the person: "you are Peter... I will give you the keys." A confession does not hold keys.

(c) "Paul rebuked Peter."

At its strongest: "And when Cephas came to Antioch, I opposed him to his face because he clearly was wrong" (Galatians 2:11). A supreme, infallible leader would not need correcting.

Answer: St. Peter "began to draw back and separated himself" from Gentile believers, "because he was afraid of the circumcised" (Galatians 2:12). The problem was conduct, not doctrine: "they were not on the right road in line with the truth of the gospel" (Galatians 2:14). St. Peter had already taught the right doctrine (Acts 10–11; 15:7–11), which is exactly why he was inconsistent. Catholics affirm popes can sin and be rightly rebuked. Infallibility covers definitive teaching, not behavior (CCC 891).

(d) "James presided at Jerusalem."

At its strongest: St. James speaks last and says, "It is my judgment, therefore, that we ought to stop troubling the Gentiles who turn to God" (Acts 15:19).

Answer: St. James led the Jerusalem Church and spoke with real authority. But St. Peter rose after the debate and gave the decisive doctrinal word, and "the whole assembly fell silent" (Acts 15:12). St. James then builds on him: "Symeon has described how God first concerned himself with acquiring from among the Gentiles a people for his name" (Acts 15:14), and adds practical guidance for Jewish-Gentile fellowship (Acts 15:20).

(e) "Scripture never mentions succession."

At its strongest: No verse says, "Peter's authority passes to the bishop of Rome."

Answer: Scripture gives the principle and the pattern: offices outlive their holders (Acts 1:20–26), authority is handed down (2 Timothy 2:2; Titus 1:5), and the keys of Isaiah 22 pass from one man to the next. Jesus promised the gates of the netherworld would not prevail against His Church (Matthew 16:18). Nor does any verse say the Church's authority dies with the last apostle.

(f) "All the apostles received binding and loosing."

At its strongest: Jesus tells the disciples, "whatever you bind on earth shall be bound in heaven" (Matthew 18:18).

Answer: Agreed: "The office of binding and loosing which was given to Peter was also assigned to the college of apostles united to its head" (CCC 881). But in Matthew 18:18 "you" is plural; in 16:19 it is singular. And only St. Peter receives the keys and the name Rock.

(g) Orthodox: "A primacy of honor, not authority."

At its strongest: Our Orthodox brethren honor St. Peter and grant Rome first place in the early Church, but as first among equals, without authority over the whole Church.

Answer: The texts describe authority, not just honor. Keys mean "confer on him your authority" (Isaiah 22:21). St. Peter is told to shepherd Christ's whole flock (John 21:15–17) and strengthen his fellow apostles (Luke 22:32). And the earliest Fathers below treat Rome's authority as real: St. Irenaeus says every Church "should agree with this Church, on account of its preeminent authority." In the seventh century the bishops of an ecumenical council, meeting in Constantinople, wrote to Pope St. Agatho: "Therefore to thee, as to the bishop of the first see of the Universal Church, we leave what must be done" (Letter of the Council to St. Agatho).

(h) "Christ is the only Head and Shepherd of the Church."

At its strongest: "He is the head of the body, the church" (Colossians 1:18). Jesus promised "one flock, one shepherd" (John 10:16), and St. Peter himself calls Jesus "the chief Shepherd" (1 Peter 5:4). A pope looks like a rival head.

Answer: Every Catholic affirms Colossians 1:18. The question is whether Christ shepherds through men. Scripture says He does. The same St. Peter who calls Jesus "the chief Shepherd" tells the elders, "Tend the flock of God in your midst" (1 Peter 5:2). St. Paul tells the Ephesian elders the Holy Spirit made them "overseers" of the flock (Acts 20:28). And the one Shepherd of John 10 is the same Jesus who told one man, "Feed my sheep" (John 21:17). A chief Shepherd implies under-shepherds. St. Peter is the first of them, by Christ's own word. That is what "Vicar of Christ" means: not a second head, but the visible steward of the one Head, like Eliakim over the house of David.

(i) "Peter denied Christ and was called 'Satan.' He was no rock."

At its strongest: Moments after Matthew 16:18, Jesus says to St. Peter, "Get behind me, Satan! You are an obstacle to me" (Matthew 16:23). Later St. Peter denies Him three times. How can such a man be the Church's foundation?

Answer: St. Matthew placed the rebuke right after the promise, and he did not see a contradiction. The promise rests on Christ's power, not St. Peter's strength: "For flesh and blood has not revealed this to you, but my heavenly Father" (Matthew 16:17). Jesus foretold the fall and the restoration in one breath: "I have prayed that your own faith may not fail; and once you have turned back, you must strengthen your brothers" (Luke 22:32). Three denials, then three commissions (John 21:15–17). St. Peter's weakness does not undercut the papacy. It proves the office stands on Christ's prayer, which is exactly why it can outlast weak men.

(j) "Grant Peter everything. Where does Scripture give it to the bishop of Rome?"

At its strongest: Grant that St. Peter was the rock, held the keys and had primacy. Matthew 16:18–19, Luke 22:32 and John 21:15–17 are spoken to Peter, by name. No verse says this authority passes to anyone, much less to the bishop of Rome with "full, supreme, and universal power over the whole Church" (CCC 882). A personal gift became a Roman office.

Answer: Jesus' words echo Isaiah 22, where God tells Shebna, "I will thrust you from your office" (Isaiah 22:19), summons "my servant Eliakim" and places "the key of the House of David on his shoulder" (Isaiah 22:20–22). The key belongs to an office, and the office has a successor. Christ prays for St. Peter so that he will "strengthen your brothers" (Luke 22:32), and commands him to feed His whole flock (John 21:15–17). The brothers and the flock outlive St. Peter. "The gates of the netherworld shall not prevail against it" (Matthew 16:18), and Christ is with her "always, until the end of the age" (Matthew 28:20). What He built into her lasts as long as she does.

Why Rome? St. Peter wrote from "Babylon" (1 Peter 5:13), early tradition places his death there, and the earliest Church looked there. Around AD 96, with St. John by tradition still living, Pope St. Clement I wrote from Rome to correct the Church at Corinth, warning that any who "should be disobedient unto the words spoken by Him through us" would "entangle themselves in no slight transgression and danger" (1 Clement 59). St. Ignatius greets Rome as the Church "which also presides." St. Irenaeus traces Rome's bishops from the apostles and says every Church must "agree with this Church." St. Cyprian calls Rome "the throne of Peter" and "the chief church whence priestly unity takes its source."

Yes, the same St. Cyprian later resisted Pope St. Stephen I, who forbade rebaptizing converts baptized by heretics. Yet Stephen ruled the question for Churches far beyond Rome and claimed, as St. Cyprian's ally Firmilian complained, "the succession from Peter." The Church followed Stephen, not St. Cyprian, on that very question. The full doctrine was solemnly defined at the First Vatican Council in 1870: development of what is there in seed, the way the Councils of Nicaea (325) and Constantinople (381) defined the doctrine of the Trinity from what Scripture already held. A Protestant who accepts Nicaea's precision has no consistent ground to refuse it here.

The Early Church Agrees

Scripture carries the argument. The Fathers show how the first Christians read it: St. Peter's office was real, it was at Rome, and Rome's Church carried his authority.

• Pope St. Clement I (St. Clement of Rome) (Letter to the Corinthians, c. AD 96): Rome intervenes in a dispute at Corinth and apologizes for the delay in doing so (ch. 1). The apostles foresaw "strife on account of the office of the episcopate" and provided that "other approved men should succeed them in their ministry" (ch. 44).
• St. Ignatius of Antioch (Letter to the Romans, preface, c. AD 107): the Church "which also presides in the place of the region of the Romans" and "which presides over love." Writing to Rome, he adds, "I do not, as Peter and Paul, issue commandments unto you" (ch. 4). The bishop of Antioch assumes both apostles had taught Rome with authority.
• St. Irenaeus (Against Heresies 3.3.2–3, c. AD 180): Rome was "founded and organized at Rome by the two most glorious apostles, Peter and Paul," and "it is a matter of necessity that every Church should agree with this Church, on account of its preeminent authority [potiorem principalitatem]." This passage survives in an early Latin translation, and scholars debate the exact force of that phrase; taken alone it does not prove everything Vatican I defined. But on any reading, Rome is the Church every other Church must agree with. He lists Rome's bishops from Pope St. Linus to Pope St. Eleutherius, "in the twelfth place from the apostles."
• Tertullian (Prescription Against Heretics 22, c. AD 200): St. Peter is "the rock on which the church should be built," who obtained "the keys of the kingdom of heaven." (Even later, as a Montanist disputing a bishop in On Modesty 21, he read Matthew 16 as a grant given personally to St. Peter.)
• St. Cyprian (On the Unity of the Church 4, c. AD 251): though Jesus gave all the apostles "an equal power," "yet, that He might set forth unity, He arranged by His authority the origin of that unity, as beginning from one." (Two versions of this chapter survive; on either, unity begins with St. Peter.) Writing to Pope St. Cornelius, St. Cyprian describes schismatics sailing to "the throne of Peter, and to the chief church whence priestly unity takes its source" (Epistle 54.14, c. AD 252).

Conclusion: An Invitation

The papacy is not a medieval add-on. It grows straight out of Scripture: a renamed fisherman, the keys of the house of David, a prayer that his faith would not fail, a threefold command to feed Christ's sheep, and a Church that kept looking to St. Peter.

If you are Protestant, we are not asking you to trust a man over Scripture. We are asking you to take Matthew 16, Isaiah 22, Luke 22, and John 21 at full strength. Read them again, slowly, and ask what the keys meant to those who first heard Jesus.

Come home. The keys Christ gave to St. Peter are still held today by his successor, the bishop of Rome, in the Catholic Church. Christ did not found many churches. He founded one, on St. Peter and the apostles (Matthew 16:18), and that Church is the Catholic Church. "It is through Christ's Catholic Church alone, which is the universal help toward salvation, that the fullness of the means of salvation can be obtained" (CCC 816). If you are a baptized Christian, you already share "a certain, although imperfect, communion" with her (CCC 838). Every truth you already hold is a call to the rest of the way. Christ is calling you into the Catholic Church.

Your next step: Come to Mass this Sunday at your local Catholic church. You can find one near you at MassTimes.org. Everyone is welcome; if you're not yet Catholic, pray with us but don't receive Communion yet. When you're ready to become Catholic, call the parish office and ask about OCIA, the Order of Christian Initiation of Adults. They will walk you through every step. Read our guide: How Do I Become Catholic? Not ready yet? Get our free pocket guide below and keep learning.

FAQ

Where is the pope in the Bible? In St. Peter. Jesus named him Rock and gave him the keys (Matthew 16:18–19), told him to strengthen his brothers (Luke 22:32), and made him shepherd of His flock (John 21:15–17). The pope is St. Peter's successor in that office.

Does the Bible say St. Peter was in Rome? St. Peter writes from "Babylon" (1 Peter 5:13), an early Christian name for Rome. St. Irenaeus says St. Peter and St. Paul founded the Church there (Against Heresies 3.3.2).

Is the pope infallible in everything he says? No. Only when he defines a doctrine of faith or morals by a definitive act as supreme teacher of all the faithful (CCC 891). He can still sin and err in personal opinions. But his ordinary teaching on faith and morals still calls for "religious assent" (CCC 892).

Why does the Greek say Petros and petra? Petra is feminine, so a man's name needed Petros. In Jesus' Aramaic it is Kepha both times (John 1:42).

Sources

Scripture (NABRE, bible.usccb.org): Isaiah 22:15–23; 2 Kings 18:18; Matthew 10:2; 16:13–19, 23; 17:27; 18:18; 28:20; Mark 16:7; Luke 5:3; 22:31–32; 24:34; John 1:42; 10:11, 16; 21:15–17; Acts 1:15–26; 2:14; 5:1–11; 9:32; 10:47–48; 11:2–18; 12:5; 15:7–23; 20:28; 1 Corinthians 3:11; 10:4; 15:5; Galatians 1:18; 2:9–14; Ephesians 2:20; Colossians 1:18; 2 Timothy 2:2; Titus 1:5; 1 Peter 5:1, 2, 4, 13; Revelation 3:7; 21:14.

Catechism of the Catholic Church (vatican.va): 552, 553, 816, 838, 880, 881, 882, 883, 891, 892, 895.

Church Fathers (Ante-Nicene Fathers translation, newadvent.org): St. Clement of Rome, Letter to the Corinthians 1, 44 and 59 (Lightfoot translation); St. Ignatius, Letter to the Romans, preface; St. Irenaeus, Against Heresies 3.3.2–3; Tertullian, Prescription Against Heretics 22 and On Modesty 21; St. Cyprian, On the Unity of the Church 4 and Epistle 54.14; Firmilian, Letter to St. Cyprian (Epistle 74.17). On Pope St. Stephen I and the rebaptism dispute: Catholic Encyclopedia, "St. Cyprian of Carthage".

Councils (NPNF): Pope St. Agatho, Letter to the Emperor (read at Constantinople III, newadvent.org); Third Council of Constantinople (680–681), Prosphoneticus to the Emperor and Letter of the Council to St. Agatho (ccel.org).