AdFontes.AI
Ad fontes — to the sources

Making timeless theology
accessible to everyone.

Sit at the feet of Augustine. Argue with Aquinas. Read Romans alongside Calvin and Wesley. Two thousand years of Christian wisdom — in conversation with you.

Joining 40 theologians already in residence.
Portrait of Augustine of Hippo
Augustine of Hippo · Confessions
“Our hearts are restless until they rest in Thee.”
Drawn from the source

Their actual words

Twenty centuries of fathers, reformers, mystics, and doctors wrote these things down. Every answer comes directly from those texts — not a chatbot’s secondhand notion.

Cited, never invented

Every claim, footnoted

Click any citation to see the chapter, paragraph, and translation — every claim traceable to the paragraph. Read the original passage in one click.

Real conversation

Listen. Learn. Wrestle.

Sit with Augustine on grace. Let Aquinas sharpen your reasoning. Hear Chrysostom preach to your heart. These spiritual masters keep their convictions intact.

In residence

Forty voices,
two thousand years.

From the desert fathers to the Wesleyan revival — every tradition, in their own words. Scroll to drift through the catalogue.

Portrait of Ambrose of Milan
Patristic

Ambrose of Milan

c. 339-397 AD
Portrait of Anselm of Canterbury
Medieval

Anselm of Canterbury

1033-1109 AD
Portrait of Augustine of Hippo
Patristic

Augustine of Hippo

354-430 AD
Portrait of Bernard of Clairvaux
Medieval

Bernard of Clairvaux

1090-1153
Portrait of Charles Finney
Modern

Charles Finney

1792-1895
Portrait of Charles Spurgeon
Modern

Charles Spurgeon

1834-1892
Portrait of Cyril of Jerusalem
Patristic

Cyril of Jerusalem

313-386 AD
Portrait of Gregory of Nyssa
Patristic

Gregory of Nyssa

c. 335-395 AD
Portrait of Ignatius of Antioch
Apostolic

Ignatius of Antioch

c. 35-108 AD
Portrait of Jacobus Arminius
Post Reformation

Jacobus Arminius

1560-1609
Portrait of John Bunyan
Post Reformation

John Bunyan

1628-1688
Portrait of John Chrysostom
Patristic

John Chrysostom

c. 347-407 AD
Portrait of John of Damascus
Byzantine

John of Damascus

c. 676-749 AD
Portrait of John Owen
Post Reformation

John Owen

1616-1683
Portrait of Jonathan Edwards
Enlightenment

Jonathan Edwards

1703-1758
Portrait of Justin Martyr
Ante Nicene

Justin Martyr

c. 100-165
Portrait of Menno Simons
Reformation

Menno Simons

1496-1561
Portrait of Teresa of Avila
Reformation

Teresa of Avila

1515-1582
Portrait of Thomas Aquinas
Medieval

Thomas Aquinas

1225-1274
Portrait of Thomas Watson
Post Reformation

Thomas Watson

1620-1686
Portrait of Ambrose of Milan
Patristic

Ambrose of Milan

c. 339-397 AD
Portrait of Anselm of Canterbury
Medieval

Anselm of Canterbury

1033-1109 AD
Portrait of Augustine of Hippo
Patristic

Augustine of Hippo

354-430 AD
Portrait of Bernard of Clairvaux
Medieval

Bernard of Clairvaux

1090-1153
Portrait of Charles Finney
Modern

Charles Finney

1792-1895
Portrait of Charles Spurgeon
Modern

Charles Spurgeon

1834-1892
Portrait of Cyril of Jerusalem
Patristic

Cyril of Jerusalem

313-386 AD
Portrait of Gregory of Nyssa
Patristic

Gregory of Nyssa

c. 335-395 AD
Portrait of Ignatius of Antioch
Apostolic

Ignatius of Antioch

c. 35-108 AD
Portrait of Jacobus Arminius
Post Reformation

Jacobus Arminius

1560-1609
Portrait of John Bunyan
Post Reformation

John Bunyan

1628-1688
Portrait of John Chrysostom
Patristic

John Chrysostom

c. 347-407 AD
Portrait of John of Damascus
Byzantine

John of Damascus

c. 676-749 AD
Portrait of John Owen
Post Reformation

John Owen

1616-1683
Portrait of Jonathan Edwards
Enlightenment

Jonathan Edwards

1703-1758
Portrait of Justin Martyr
Ante Nicene

Justin Martyr

c. 100-165
Portrait of Menno Simons
Reformation

Menno Simons

1496-1561
Portrait of Teresa of Avila
Reformation

Teresa of Avila

1515-1582
Portrait of Thomas Aquinas
Medieval

Thomas Aquinas

1225-1274
Portrait of Thomas Watson
Post Reformation

Thomas Watson

1620-1686
Portrait of Andrew Murray
Modern

Andrew Murray

1828-1917
Portrait of Athanasius of Alexandria
Patristic

Athanasius of Alexandria

c. 296-373 AD
Portrait of Basil the Great
Patristic

Basil the Great

c. 330-379
Portrait of Catherine of Siena
Medieval

Catherine of Siena

1347-1380 AD
Portrait of Charles Hodge
Modern

Charles Hodge

1797-1878
Portrait of Cyril of Alexandria
Patristic

Cyril of Alexandria

c. 376-444 AD
Portrait of Gregory of Nazianzus
Patristic

Gregory of Nazianzus

329-390 AD
Portrait of Gregory the Great
Patristic

Gregory the Great

540-604 AD
Portrait of Irenaeus of Lyon
Ante Nicene

Irenaeus of Lyon

c. 130-202 AD
Portrait of Jerome
Patristic

Jerome

347-420 AD
Portrait of John Calvin
Reformation

John Calvin

1509-1564
Portrait of John Knox
Reformation

John Knox

c. 1514–1572
Portrait of John of the Cross
Reformation

John of the Cross

1542-1591
Portrait of John Wesley
Enlightenment

John Wesley

1703-1791
Portrait of Julian of Norwich
Medieval

Julian of Norwich

c. 1342-1416
Portrait of Martin Luther
Reformation

Martin Luther

1483-1546
Portrait of Origen
Ante Nicene

Origen

185-254
Portrait of Thomas à Kempis
Medieval

Thomas à Kempis

c. 1380-1471 AD
Portrait of Thomas Cranmer
Reformation

Thomas Cranmer

1489-1556
Portrait of Ulrich Zwingli
Reformation

Ulrich Zwingli

1484-1531
Portrait of Andrew Murray
Modern

Andrew Murray

1828-1917
Portrait of Athanasius of Alexandria
Patristic

Athanasius of Alexandria

c. 296-373 AD
Portrait of Basil the Great
Patristic

Basil the Great

c. 330-379
Portrait of Catherine of Siena
Medieval

Catherine of Siena

1347-1380 AD
Portrait of Charles Hodge
Modern

Charles Hodge

1797-1878
Portrait of Cyril of Alexandria
Patristic

Cyril of Alexandria

c. 376-444 AD
Portrait of Gregory of Nazianzus
Patristic

Gregory of Nazianzus

329-390 AD
Portrait of Gregory the Great
Patristic

Gregory the Great

540-604 AD
Portrait of Irenaeus of Lyon
Ante Nicene

Irenaeus of Lyon

c. 130-202 AD
Portrait of Jerome
Patristic

Jerome

347-420 AD
Portrait of John Calvin
Reformation

John Calvin

1509-1564
Portrait of John Knox
Reformation

John Knox

c. 1514–1572
Portrait of John of the Cross
Reformation

John of the Cross

1542-1591
Portrait of John Wesley
Enlightenment

John Wesley

1703-1791
Portrait of Julian of Norwich
Medieval

Julian of Norwich

c. 1342-1416
Portrait of Martin Luther
Reformation

Martin Luther

1483-1546
Portrait of Origen
Ante Nicene

Origen

185-254
Portrait of Thomas à Kempis
Medieval

Thomas à Kempis

c. 1380-1471 AD
Portrait of Thomas Cranmer
Reformation

Thomas Cranmer

1489-1556
Portrait of Ulrich Zwingli
Reformation

Ulrich Zwingli

1484-1531
Three doors into the tradition

Three ways to access
twenty centuries of wisdom.

Choose your posture: as a student at one master’s feet, as the moderator of a roundtable across centuries, or as a pilgrim reading Scripture with the Church.

Mode I

Chat

One-on-One Mentorship

Sit at the feet of a single master. Ask anything; receive answers in their own voice, drawn from their own works.

  • Personal dialogue with any theologian
  • Answers grounded in their writings
  • Like having Augustine as your spiritual director
A
Augustine of Hippo354–430 · Doctor of Grace
Why do I feel pulled into worldly things?
“The world itself—God’s creation of heaven and earth—is not evil; what corrupts you is the way you love it. But you must uproot the love of the world that chokes the seed of charity.”Homilies on 1 John, Hom. 2, §8
Mode II

Panel

Watch the Giants Debate

Convene up to three thinkers from across centuries. Pose your question. Watch them argue, agree, and refine each other in real time.

  • Up to three theologians per session
  • Cross-traditional perspectives
  • Join the conversation yourself
Panel · 3 voices live
ACW
Calvin

On grace we agree, but on its mode and means we differ — and the differences are not small.

Wesley

Brother, you say the will is wholly bound. I say grace finds the will and frees it.

Aquinas

The will is moved by the good — but its proximate freedom remains.

Mode III

Study

Read Scripture with the Masters

Choose a passage. Choose your guides. See how the Church has read the Scriptures — verse by verse, century by century.

  • Up to three voices in dialogue
  • Verse-by-verse historical commentary
  • Apply timeless wisdom to today
Romans 8 · 28Three voices

“And we know that all things work together for good to them that love God…”

  • Chrysostomhears providence
  • Calvinhears election
  • Wesleyhears love
Ad fontes

You’ve spent too long
in the shallows.

The Church has been thinking carefully about God for two thousand years. Skip the noise. Drink from the springs. Let the great voices form you.

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