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Understanding the Church Jesus Founded

Five introductory lessons with the biblical texts, the earliest historical evidence, and the interpretations of the different Christian traditions clearly labelled.

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Lesson 1 of 5

What Jesus established

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The Gospels present Jesus gathering disciples, choosing twelve, giving them authority, and commissioning them to teach. This lesson looks at what the texts say and where interpretations differ.

Scripture

  • Mark 3:13–19 — the appointment of the Twelve
  • Luke 10:16 — “whoever listens to you listens to me”
  • Acts 2:41–47 — the first community in Jerusalem

Historical evidence

All four Gospels describe Jesus calling disciples and setting apart a smaller group of twelve. The number twelve is itself a claim: it recalls the twelve tribes of Israel, and it presents the group as the nucleus of a renewed people rather than as a loose circle of students.

The Acts of the Apostles then describes a community with recognisable structure: common teaching, common prayer, the breaking of bread, shared goods, and named leaders who settle disputes. Whatever one concludes theologically, the historical picture in the first century is of an organised movement, not a purely private religion.

Viewpoints compared

Catholic interpretation

Catholic teaching holds that Christ founded a visible, hierarchically ordered Church with the Twelve at its head, and that this Church subsists in the communion of bishops united with the Bishop of Rome (Second Vatican Council, Lumen Gentium 8, 18–20).

Orthodox interpretation

Eastern Orthodox theology likewise affirms a visible apostolic Church governed by bishops, but locates its unity in the communion of local churches and their councils rather than in a universal jurisdiction of Rome.

Protestant interpretation

Many Protestant traditions affirm that Christ founded the Church but understand it primarily as the community of believers created by the preaching of the gospel; visible structures are seen as important yet historically variable rather than divinely fixed.

Academic historians

Historians of early Christianity generally agree that the Jesus movement rapidly developed communal structures and recognised authorities, while debating how quickly offices such as bishop, presbyter and deacon became distinct.

Sources and References

Lesson 2 of 5

Matthew 16:18 and the role of Peter

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The single most discussed verse in debates about Church structure, read with its Greek and Aramaic background and with the main competing interpretations set side by side.

Scripture

  • Matthew 16:13–19 — “You are Peter, and on this rock I will build my church”
  • John 21:15–17 — “Feed my sheep”
  • Luke 22:31–32 — “strengthen your brothers”

Historical evidence

In the Greek text Jesus says: “You are Petros, and on this petra I will build my ekklēsia.” The change of ending is a feature of Greek grammar, since petra is a feminine noun; in Aramaic, the language Jesus most likely spoke, the same word Kepha would stand in both places, which is why Paul repeatedly calls him Cephas (1 Corinthians 1:12; Galatians 2:9).

Peter is named first in every New Testament list of apostles, speaks for the group at Pentecost, and presides over the choice of Judas's successor in Acts 1. These are literary and historical observations that readers of every tradition can verify; what they mean for later Church government is the contested question.

Viewpoints compared

Catholic interpretation

The rock is Peter himself, and the keys signify a stewardship handed on to his successors in the see of Rome.

Orthodox interpretation

Peter holds a genuine primacy of honour among the apostles, but the rock is commonly read as his confession of faith, which every orthodox bishop shares.

Protestant interpretation

Reformers such as Calvin read the rock as Peter's confession or as Christ himself, so the passage grounds apostolic faith rather than a continuing office in Rome.

Debated or uncertain

The verse's original wording is secure in the manuscripts, but its institutional implications are genuinely disputed among specialists and should not be presented as historically settled.

Sources and References

  • Matthew 16:13–19biblegateway.com
  • Raymond E. Brown, K. P. Donfried, J. Reumann (eds.), Peter in the New Testament (1973)
  • Catechism of the Catholic Church 552–553vatican.va

Lesson 3 of 5

Matthew 18:17, Matthew 28:19–20 and Church authority

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Two passages in Matthew show a community able to judge disputes and a commission to teach all nations. Together they describe authority that is both disciplinary and doctrinal.

Scripture

  • Matthew 18:15–18 — “tell it to the church”
  • Matthew 28:19–20 — “teach them to observe all that I have commanded you”

Historical evidence

Matthew 18 assumes a community that can hear a case and reach a binding decision. Matthew 28 assumes a body that will still be teaching “all nations” long after the first generation. Neither text describes offices in detail, which is why later development matters so much to the historical argument.

1 Timothy 3:15 calls the Church “the pillar and bulwark of the truth”, and John 17:20–23 records Jesus praying for the unity of those who believe. These verses are used across traditions, but with different conclusions about how visible that unity must be.

Viewpoints compared

Catholic interpretation

The teaching commission is exercised by the bishops in communion with the pope, whose judgements can be definitive in matters of faith and morals.

Protestant interpretation

Authority to teach is real but ministerial and always subject to Scripture, which alone is finally normative.

Academic historians

Historians note that decision-making in the first two centuries was largely local and collegial, becoming more formalised as councils developed.

Sources and References

Lesson 4 of 5

Apostolic succession and early Church leadership

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How leadership passed from the apostles to bishops, and what the earliest surviving documents actually say about it.

Scripture

  • Acts 1:15–26 — the choice of Matthias
  • Acts 14:23 — appointing elders in each church
  • 2 Timothy 2:2 — entrusting the teaching to others

Historical evidence

The earliest non-biblical evidence is remarkably early. Around AD 96 Clement of Rome writes to Corinth that the apostles appointed successors and provided for further succession (1 Clement 42–44). Around AD 107 Ignatius of Antioch writes of a single bishop with presbyters and deacons in each city. Around AD 180 Irenaeus lists the bishops of Rome from the apostles to his own day (Against Heresies III.3).

Historians debate how uniform this pattern was: some communities may have been led by a council of presbyters well into the second century. The documents above are genuine and datable, but they describe particular regions and should not be flattened into a single uniform system.

Viewpoints compared

Catholic interpretation

Succession through the laying on of hands transmits apostolic office and guarantees continuity of teaching and sacraments.

Orthodox interpretation

The same sacramental succession is affirmed, understood within the communion of local churches.

Protestant interpretation

Many hold that true succession is succession in apostolic doctrine rather than an unbroken chain of ordinations.

Debated or uncertain

The uniformity of the single-bishop structure in the first century is genuinely debated among historians.

Sources and References

  • Clement of Rome, Letter to the Corinthians 42–44 (c. AD 96)newadvent.org
  • Ignatius of Antioch, Letter to the Smyrnaeans 8 (c. AD 107)newadvent.org
  • Irenaeus, Against Heresies III.3 (c. AD 180)newadvent.org

Lesson 5 of 5

Acts 15 and the Council of Jerusalem

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The first recorded assembly of the Church shows apostles and elders deliberating a doctrinal question and issuing a decision for other communities.

Scripture

  • Acts 15:1–29 — the assembly and its letter
  • Galatians 2:1–10 — Paul's account of a Jerusalem meeting

Historical evidence

The question was whether Gentile converts had to be circumcised and keep the Mosaic law. Acts describes debate, testimony from Peter, argument from Paul and Barnabas, a judgement voiced by James, and a written decision sent to Antioch, Syria and Cilicia with the formula “it has seemed good to the Holy Spirit and to us”.

This episode became the model for later councils: a disputed question, deliberation among recognised leaders, and a decision communicated in writing to the wider Church.

Viewpoints compared

Catholic interpretation

Acts 15 is read as the pattern of conciliar authority exercised with and under the apostolic college.

Protestant interpretation

Often read as apostolic consensus grounded in Scripture and the Spirit rather than as a precedent for hierarchical jurisdiction.

Academic historians

Scholars debate the relationship between Acts 15 and Galatians 2, including whether they describe the same meeting.

Sources and References