Course 12 · Theology and Tradition
Patristics and Historical Theology
Trace how Christians have thought, argued and prayed from the apostolic age to the present, reading the major writers and councils in their own words.
Overview
This course is a guided survey of Christian thought across twenty centuries. It begins with the generation after the apostles, follows the early apologists and the great Fathers through the age of the creeds and councils, passes through the medieval church and the Reformation, and ends with the modern period. Its aim is to show how doctrine was actually formed: through worship, controversy, Scripture, philosophy and the lives of particular people.
The course is taught from primary sources wherever possible. Each module names a few writers, explains who they were and why they mattered, and sends you to their own words. Technical terms such as homoousios, hypostasis, scholasticism and justification are explained the first time they appear. Secondary works give the narrative and the scholarly background, and the course keeps separate what historians agree on, what is still debated, and what each church teaches.
Catholic, Orthodox and Protestant readings of this history differ, sometimes sharply. Each is described so that a member of that tradition would recognize it. The course does not ask you to choose among them. It asks you to understand why each tradition reads the same history as it does, and to notice where your own assumptions come from.
By the end you will be able to place any major Christian writer or council in its setting, explain the main controversies and how they were settled, and follow a single doctrine across the centuries. The independent assignment asks you to do exactly that, and to write it up in your own notebook.
Objectives
- Describe the main writers and writings of the Apostolic Fathers and the early apologists, and explain what problems they were answering.
- Explain the arguments of Irenaeus, Tertullian and Origen and how each shaped later theology.
- Summarize how the early creeds developed and what the first seven ecumenical councils decided, with their dates.
- Explain the Trinitarian debate from Nicaea to Constantinople, including the roles of Athanasius and the Cappadocian Fathers.
- Compare Augustine, John Chrysostom and the Desert Fathers and Mothers as models of theology, preaching and spiritual life.
- Define scholasticism and explain how Thomas Aquinas used Scripture, reason and earlier authorities in the Summa Theologiae.
- Compare Catholic, Orthodox and Protestant accounts of the Reformation and the Counter-Reformation without caricature.
- Identify the main currents of modern theology and the questions that gave rise to them.
- Trace one doctrine across several periods using primary sources and distinguish development from change.
Course outline
Module 1 The Apostolic Fathers and the Early Apologists
Meet the first generations after the apostles and the writers who explained and defended the faith to a hostile world.
Topics
- Apostolic Fathers
- Early Christian apologetics
- Justin Martyr
Lessons
Module 2 Irenaeus, Tertullian and Origen
Study three writers who set the pattern for reading Scripture, defining orthodoxy and thinking about God, each with lasting strengths and disputed points.
Topics
- Irenaeus
- Tertullian
- Origen
Lessons
Module 3 Creeds and Councils: Nicaea to Chalcedon
Follow the controversies that produced the creeds and the first councils, and the people who argued them out.
Topics
- Development of early creeds
- Ecumenical councils
- Athanasius
- Cappadocian Fathers
Lessons
Module 4 Augustine, Chrysostom and the Desert
Read the great Latin theologian, the great Greek preacher and the desert tradition as three different expressions of patristic Christianity.
Topics
- Augustine
- John Chrysostom
- Desert Fathers and Mothers
Lessons
Module 5 The Medieval Church and Scholasticism
Learn how medieval theologians organized knowledge and why Thomas Aquinas became so influential.
Topics
- Medieval scholasticism
- Thomas Aquinas
Lessons
Module 6 The Reformation and the Counter-Reformation
Study the sixteenth-century divisions, the questions at stake and the responses of Rome, in the words of their own documents.
Topics
- Protestant Reformation
- Counter-Reformation
Lessons
Module 7 Modern Theology and Tracing a Doctrine
Survey the main developments since the Enlightenment and learn the method for following a single doctrine through history.
Topics
- Modern theological developments
Lessons
Suggested schedule
| When | Work |
|---|---|
| Week 1 | Module 1: The Apostolic Fathers and the Early Apologists |
| Week 2 | Module 2: Irenaeus, Tertullian and Origen |
| Week 3 | Module 3: Creeds and Councils: Nicaea to Chalcedon |
| Week 4 | Module 4: Augustine, Chrysostom and the Desert |
| Week 5 | Module 5: The Medieval Church and Scholasticism |
| Week 6 | Module 6: The Reformation and the Counter-Reformation |
| Week 7 | Module 7: Modern Theology and Tracing a Doctrine |
| Week 8 | Independent assignment and self-assessment |
Readings
Required
- J. B. Lightfoot, ed., The Apostolic Fathers
The earliest Christian writings after the New Testament, including Clement, Ignatius, Polycarp and the Didache.
How to use it: Read 1 Clement, the letters of Ignatius, the Letter of Polycarp and the Didache. Note how each handles church order, suffering and teaching.
Read online (Christian Classics Ethereal Library) In the library - Justin Martyr, The First Apology
A second-century defense of Christianity addressed to the Roman emperor. The model of early Christian reasoning with outsiders.
How to use it: Read the whole text. Note how Justin describes Christian worship and how he argues that Christians are not a threat to the state.
Read online (New Advent (Church Fathers)) In the library - Irenaeus of Lyon, Against Heresies
The first great defense of apostolic teaching against Gnostic rivals. Essential for the question of how Scripture and tradition relate.
How to use it: Read Book 1, the opening chapters, and Book 3, chapters 1 to 4, on Scripture and apostolic teaching.
Read online (New Advent (Church Fathers)) In the library - Athanasius of Alexandria, On the Incarnation of the Word
A short and clear account of why God became man. It is the best first patristic text for a beginner.
How to use it: Read the whole short work. Write one paragraph on why Athanasius thinks only God could save humanity.
Read online (New Advent (Church Fathers)) In the library - Philip Schaff and Henry Wace, eds., The Seven Ecumenical Councils (Nicene and Post-Nicene Fathers, Series 2, vol. 14)
The decrees and canons of Nicaea, Constantinople, Ephesus and Chalcedon with the surrounding history. The primary text for Courses 5, 6 and 9.
How to use it: Read the creeds, canons and definitions of the councils. Keep a table with date, place, issue and decision for each council.
Read online (Christian Classics Ethereal Library) In the library - Augustine of Hippo, Confessions
Augustine’s account of his restless search for God. Read Book I and then Book VIII, the story of his conversion.
How to use it: Read selectively: Books 1 to 3, Book 8 and Book 10 are a good start. Note how Augustine mixes autobiography with prayer.
Read online (New Advent (Church Fathers)) In the library - Thomas Aquinas, Summa Theologiae
The great medieval summary of Christian theology. It is long; use the questions assigned in each course rather than reading straight through.
How to use it: Read selectively. Pick one question on a topic you studied and follow the pattern of objections, reply and answer.
Read online (New Advent) In the library - J. N. D. Kelly, Early Christian Doctrines
A standard account of how Christian doctrine took shape in the first centuries.
How to use it: Use it as a reference to place each Father within the larger history of doctrine.
Find in a library or bookstore catalog (Open Library) In the library
Recommended
- Justo L. Gonzalez, The Story of Christianity
A standard one-volume or two-volume survey of church history from the apostles to the present.
How to use it: A readable narrative history to keep the whole timeline in view.
Find in a library or bookstore catalog (Open Library) In the library - Jaroslav Pelikan, The Christian Tradition: A History of the Development of Doctrine (5 volumes)
A major history of how doctrine developed across all three great traditions, to the modern age.
How to use it: Read selectively for the history of how doctrine developed in each period.
Find in a library or bookstore catalog (Open Library) In the library - Tertullian, The Prescription Against Heretics
A sharp early argument about who may interpret Scripture and by what authority. Read it alongside Irenaeus.
How to use it: Read to see how Tertullian argues against heretics and compare with Irenaeus.
Read online (New Advent (Church Fathers)) In the library - Origen, On First Principles (De Principiis)
The first systematic Christian theology, with a long discussion of how to interpret Scripture. Some of its ideas were later rejected.
How to use it: Read selectively. Distinguish what Origen proposes tentatively from what the church later rejected.
Read online (New Advent (Church Fathers)) In the library - Basil of Caesarea, On the Holy Spirit (De Spiritu Sancto)
Basil’s defense of the full divinity of the Holy Spirit and a key text on unwritten tradition.
How to use it: A key text for the doctrine of the Holy Spirit and for the Cappadocian approach to Trinitarian language.
Read online (New Advent (Church Fathers)) In the library - John Chrysostom, On the Priesthood
A fourth-century dialogue on the weight of the priestly office. Useful for the questions of ordination and church authority.
How to use it: A window into the pastoral ideal of the fourth century.
Read online (New Advent (Church Fathers)) In the library - Martin Luther, The Small Catechism
Luther’s short teaching on the Commandments, the Creed, the Lord’s Prayer and the sacraments.
How to use it: A short Reformation text written for ordinary believers.
Read online (Christian Classics Ethereal Library) In the library - Council of Trent (1545-1563), Canons and Decrees of the Council of Trent
The Catholic response to the Reformation on Scripture, justification and the sacraments. Read it as a Catholic statement of its own position.
How to use it: Read the decrees on justification and the sacraments to hear the Catholic response in its own words.
Read the canons and decrees (Hanover College) In the library
Passages in the Scripture Study
- Acts 2:42 The earliest pattern of teaching, fellowship, breaking of bread and prayer, which later writers treated as the model of church life.
- 1 Peter 3:15 The call to give a reason for hope, often cited in studies of the apologists.
- John 1:14 The Word became flesh; the foundation for debates about the Logos and the incarnation.
- John 1:1 In the beginning was the Word; central to the controversy with Arius.
- Philippians 2:6 Christ in the form of God; used by both sides at Nicaea and in later Christology.
- Colossians 1:15 Christ as image of the invisible God and firstborn of creation, a contested text in the Arian debate.
- Matthew 28:19 The Trinitarian baptismal formula, behind the early creeds.
- 1 Corinthians 15:3 Paul’s early summary of the gospel that he received, an ancestor of later creeds.
- Romans 5:12 Central to Augustine’s account of original sin and to disagreement between East and West about its meaning.
- Romans 3:28 Justification by faith, the key verse in Luther’s argument.
- James 2:24 Read alongside Romans 3:28 in the debates about faith and works.
- 2 Timothy 2:2 Handing on what has been heard to faithful people, used in discussions of apostolic tradition.
- Matthew 16:18 Interpreted differently by Catholic, Orthodox and Protestant traditions in debates about authority.
- 2 Peter 1:4 Sharing in the divine nature, a central text for the Eastern doctrine of theosis.
- Matthew 19:21 The call to sell everything, which was a driving text for Anthony and the desert monks.
Independent assignment
Tracing a Doctrine Through History
- Purpose
- To follow one Christian doctrine from its biblical roots through the early church, the medieval period, the Reformation and the modern world, and to explain how and why its expression changed or stayed the same.
- Instructions
- Choose one doctrine from this list or a similar one: the Trinity, the person of Christ, original sin and grace, the atonement, the Eucharist, justification, or the authority of Scripture.
- Define the doctrine in a short paragraph in your own words. Write down what a Catholic, an Orthodox and a Protestant Christian would each say today in the briefest form you can.
- Identify the biblical texts that every later period appeals to and explain in one or two sentences how each has been read.
- Select at least one primary source from the early church (before 451), one from the medieval period and one from the Reformation or Counter-Reformation. Read the relevant portions and take notes on what the author says, what question the author is answering and who the author is arguing against.
- Add one modern writer or document (after 1700) and note how the doctrine is stated, questioned or reshaped.
- Build a timeline with at least six entries. For each entry, write the date or approximate date, the source, the main claim and the cause (a controversy, a council, a pastoral problem, a philosophical shift).
- Write an analysis that explains what stayed constant, what was clarified, what was added and what was lost or contested. Distinguish legitimate development of a doctrine from distortion, and explain which test you are using to decide.
- State where Catholic, Orthodox and Protestant accounts of this history diverge, and write the strongest version of each in terms its own members would accept.
- Close with a paragraph on what you are still unsure about and which source you would read next.
- Required sources
- At least three primary sources from different periods, drawn from the required and recommended readings or the library.
- At least one secondary source such as Kelly, Pelikan or Gonzalez.
- At least five of the Scripture passages listed for this course, or others relevant to your chosen doctrine.
- Length and scope
- About 3,000 to 4,500 words, or ten to fourteen pages, plus the timeline. Keep it in your own notebook or document. Do not send it anywhere.
- Questions to address
- What exactly did people disagree about, and what was at stake for them?
- Which parts of this doctrine are shared by all three traditions, and which are disputed?
- What new question or pressure caused each stage of development?
- How do I tell development of a doctrine from change in it?
- What would a thoughtful member of each tradition say is missing from my account?
- Expected output
- A written historical analysis of one doctrine, with a timeline, quotations or close paraphrases from primary sources, and a fair statement of the Catholic, Orthodox and Protestant readings.
- How it will be evaluated
- It defines the doctrine accurately and states its terms clearly.
- It uses primary sources correctly, in context, and cites them.
- It places each source in its date, setting and controversy.
- It states the three major traditions’ views fairly, even where you disagree.
- It separates scholarly consensus, active debate and church teaching.
- It makes an argument about development rather than only listing names and dates.
- Common mistakes to avoid
- Reading a later doctrine back into an early text as if the author already used later terms.
- Relying on summaries or critics instead of the sources themselves.
- Treating a single quotation as the whole position of a writer.
- Presenting one tradition’s reading of the history as if it were neutral.
- Writing a list of events with no claim about what changed and why.
Knowledge check and self-assessment
Who were the Apostolic Fathers, and why are they important?
The Apostolic Fathers are a group of early Christian writings from roughly the late first to the mid second century, including 1 Clement, the letters of Ignatius, the Letter of Polycarp, the Didache and others. They are important because they give the earliest evidence outside the New Testament for worship, church order, martyrdom and the way Christians read Scripture. The name comes from a later belief that their authors knew the apostles; that link is uncertain for several of them.
What was the aim of the early Christian apologists, and how did Justin Martyr approach it?
Apologists wrote defenses of Christianity addressed to emperors, officials and educated outsiders. They answered charges such as atheism, immorality and disloyalty. Justin Martyr, who died c. 165, argued that Christians were reasonable citizens and that the Logos, the divine Word, had been partly present in philosophers before becoming fully known in Christ. Scholars debate how far Justin’s use of philosophy shaped his theology.
What was the rule of faith, and how did Irenaeus use it against the Gnostics?
The rule of faith was a short summary of apostolic teaching about the Father, the Son and the Spirit, creation and salvation, handed down in the churches. Irenaeus argued against Gnostic teachers that Scripture should be read according to this received teaching, since the churches founded by the apostles had preserved it publicly. His point was that truth was open and shared, not a secret available only to an elite.
What was the dispute between Arius and Athanasius, and how did Nicaea answer it?
Arius taught that the Son was created and therefore a lesser being than the Father. Athanasius held that the Son shares the Father’s own being, since only God could save humanity. The Council of Nicaea in 325 declared the Son homoousios, of one substance with the Father. The word does not occur in Scripture, so the dispute was partly about whether a non-biblical term could faithfully express what Scripture says.
What did the Cappadocian Fathers contribute to Trinitarian doctrine?
Basil of Caesarea, Gregory of Nazianzus and Gregory of Nyssa clarified the vocabulary of the Trinity. They distinguished ousia, the one divine being, from hypostasis, the distinct personal reality of Father, Son and Spirit. This let the church say that God is one and three without contradiction. Their work shaped the Creed of Constantinople in 381 and the defense of the full divinity of the Holy Spirit.
How did the Council of Chalcedon describe the person of Christ, and why do some churches not accept it?
Chalcedon in 451 taught that Christ is one person in two natures, divine and human, without confusion, change, division or separation. Most churches, Catholic, Orthodox and Protestant, accept it. The Oriental Orthodox churches did not, partly because of concerns about language and partly because of political and theological disagreement, though recent dialogues suggest that some of the dispute was verbal.
What is scholasticism, and what makes Thomas Aquinas a typical scholastic?
Scholasticism was the method of teaching and study in medieval schools and universities. It set out questions, listed arguments on each side, gave an answer and replied to the objections. Aquinas, who lived c. 1225 to 1274, used this method in the Summa Theologiae. He drew on Scripture, the Fathers and Aristotle, held that faith and reason do not contradict each other, and argued that grace perfects nature and does not destroy it.
Name one point on which Catholic and Protestant accounts of the Reformation differ, and one point on which they overlap.
They differ on justification: Luther and the Reformers taught that sinners are declared righteous by faith alone, while the Council of Trent taught that justification includes inner renewal and cooperation with grace. They overlap in affirming the Trinity and the two natures of Christ, the authority of Scripture in some sense, and salvation as God’s gift. Catholic and Lutheran churches issued a joint declaration on justification in 1999, which shows the debate is still active.
Judge your own progress
- When you finish the modules, answer the knowledge questions from memory, without notes. Aim for 70 percent or better; if you score lower, reread the relevant module and try again.
- Write your doctrinal analysis (the independent assignment). Wait three days, reread it, and mark every place where a claim needs a source or a date.
- Check your work against the evaluation criteria in the assignment. Rate each criterion as strong, adequate or weak and write one sentence on how you would improve each weak one.
- Return to the key ideas after 1 day, 7 days, 30 days and 90 days. At each point, rebuild your timeline of the seven councils and explain one controversy aloud without notes.
- You can place the major Fathers, councils and medieval and Reformation figures in time and say what each contributed.
- You can explain one doctrine across several periods in a way that a member of each major tradition would recognize as fair.
- You can distinguish a primary source from a secondary one and use each appropriately.