Examine the faith that shaped the world
A rigorous, intellectually honest course for anyone who wants to move past surface-level assumptions and engage Christianity's core claims — historically, philosophically, and theologically — with the seriousness they deserve.

"I don't want to make Christianity easy to accept — I want to make it impossible to dismiss without a fair hearing."
— Theoria

What you'll learn
What you'll be able to do
- Articulate the central claims of Christianity — including creation, the person of Christ, salvation by grace, and the resurrection — with clarity and intellectual precision.
- Evaluate the historical reliability of the New Testament and trace the emergence of Christian doctrine within its Second Temple Jewish and Greco-Roman context.
- Compare Christianity's core commitments with major world religions and secular philosophies, identifying meaningful similarities and significant differences with fairness and nuance.
- Engage the most serious objections to Christian belief — including suffering, miracles, religious exclusivity, and science-and-faith tensions — with reasoned, humble responses.
- Apply principles of historical reasoning, philosophical analysis, and worldview evaluation to assess competing truth claims with greater discernment.
- Trace Christianity's shaping influence on law, science, education, literature, art, and Western civilization while honestly acknowledging the complexities of the Church's historical witness.
How it works
A school that adapts to you
This isn't a set of static videos. Every lesson is generated live and tuned to where you actually are.
We learn your level
A quick placement check tailors your starting point so you're never bored or lost.
Lessons adapt as you go
Each lesson is written for your pace and your goal, adjusting as your skills grow.
Your AI coach keeps you moving
Checkpoints, feedback, and gentle nudges turn progress into a real result.
The curriculum
What's inside your school
6 modules · 26 lessons

Thinking About Christianity: Worldview, Evidence, and Method
Equips learners with the intellectual tools — historical reasoning, philosophical analysis, and worldview evaluation — needed to investigate Christianity's claims fairly and rigorously.
- 1.1What Is a Worldview and Why Does It Matter?Included
- 1.2How to Evaluate Truth Claims: Logic, Evidence, and InferenceIncluded
- 1.3Historical Reasoning: What Historians Actually DoIncluded
- 1.4Approaching Religion Fairly: Charity, Nuance, and Intellectual HumilityIncluded
The God Question: Creation, Existence, and the Nature of Reality
Examines the philosophical and theological case for God's existence, the Christian doctrine of creation, and how the Christian account of reality compares with secular alternatives.
- 2.1Does God Exist? The Major Philosophical ArgumentsIncluded
- 2.2Creation, Cosmos, and the Christian Vision of RealityIncluded
- 2.3Science and Faith: Conflict, Dialogue, or Integration?Included
- 2.4Secular Alternatives: Naturalism, Humanism, and the Limits of a Godless UniverseIncluded
The Human Condition: Dignity, Fallenness, and the Need for Redemption
Investigates the Christian account of human nature — made in God's image yet profoundly broken — and why that diagnosis makes the gospel's answer intelligible.
- 3.1Made in the Image of God: Human Dignity and Moral WorthIncluded
- 3.2The Fall: What Christians Mean by Sin and Why It MattersIncluded
- 3.3Morality Without God? The Grounding of EthicsIncluded
- 3.4Suffering, Evil, and the God Who Is ThereIncluded
Jesus of Nazareth: History, Identity, and the Heart of Christianity
Places Jesus within his Second Temple Jewish and Roman world, evaluates the historical evidence for his life and resurrection, and examines the church's developing confession of who he is.
- 4.1The World Jesus Entered: Second Temple Judaism and the Roman EmpireIncluded
- 4.2What Can We Know About the Historical Jesus?Included
- 4.3The Reliability of the New Testament: Sources, Transmission, and EvidenceIncluded
- 4.4Who Did Jesus Claim to Be? The Christological QuestionIncluded
- 4.5The Resurrection: History's Most Contested ClaimIncluded
Salvation, Grace, and the Promise of New Creation
Unpacks the Christian gospel — salvation by grace through faith — and its eschatological horizon, tracing how these doctrines developed and why Christians find them uniquely compelling.
- 5.1The Gospel Defined: Atonement, Grace, and FaithIncluded
- 5.2How Christian Doctrine Developed: Councils, Creeds, and ControversyIncluded
- 5.3New Creation: Christian Hope and the Renewal of All ThingsIncluded
- 5.4Exclusivity and Pluralism: Is Jesus Really the Only Way?Included
Christianity Among the World's Religions and Ideas
Compares Christianity with major world religions and secular philosophies, traces its civilization-shaping influence, and equips learners to engage ongoing conversations with clarity and charity.
- 6.1Christianity and Judaism: Continuity, Fulfillment, and DifferenceIncluded
- 6.2Christianity, Islam, and Other Major World ReligionsIncluded
- 6.3Christianity's Shaping of Western CivilizationIncluded
- 6.4Miracles, Reason, and the Open UniverseIncluded
- 6.5Why Christianity? Bringing It All TogetherIncluded
Who it's for
Is this you?
The honest skeptic
He's read the critics and finds Christianity intellectually suspect — this course gives his doubts the rigorous engagement they deserve.
The curious seeker
She's drawn to Christian ideas but doesn't yet know what she believes, and wants a structured, honest place to think it through.
The new believer
He came to faith recently and wants to understand the historical, theological, and philosophical foundations beneath the commitment he's made.
The lifelong Christian
She's believed for decades but has never had the chance to examine her faith with this level of intellectual depth and academic honesty.
The philosophy or theology student
He's studying ideas formally and wants a course that engages Christianity at the level of argument, evidence, and worldview comparison his studies demand.
The lapsed or deconstructing Christian
She walked away from faith — or is in the process — and wants to revisit the core claims without pressure, on her own terms and timeline.
Questions
Frequently asked
Your teacher
A note from your teacher

Theoria
If you've ever found yourself wanting to take Christianity seriously — really seriously — but unsure how to begin, I want you to know that impulse is exactly right. Not the half-engaged Google search, not the culture-war argument at a dinner table, but a sustained, honest, intellectually rigorous engagement with what Christianity actually claims and why so many thoughtful people across two millennia have found those claims not just comforting, but true. That's the course I've tried to build here, and I'm genuinely glad you're considering it.
I'll be honest about what this course is not. It's not a devotional. It's not designed to produce a predetermined conclusion in you. And it's not going to pretend that the hard questions — the problem of suffering, the exclusivity of Christ, the church's complicated historical record, the tension between miracles and modern science — are easy or unimportant. I've spent years sitting with those questions myself, and I've come to believe that Christianity is far more intellectually defensible than its cultured despisers claim, and far more demanding than its casual defenders suggest. Both observations matter, and this course takes both seriously.
What you'll find here is a structured journey through the deepest questions: Does God exist, and what do the philosophical arguments actually establish? What do we know about Jesus of Nazareth — as a matter of history — and what did he claim about himself? How did the New Testament come to us, and is it reliable? What does the resurrection mean as a historical event, and what are the best counter-explanations? How does Christianity compare — fairly, generously, precisely — with Judaism, Islam, secular humanism, and the other great systems of meaning competing for your allegiance? These aren't rhetorical questions. We work through them, carefully, together.
I've also tried to model something I believe is in short supply in conversations about faith: intellectual charity. That means applying the same critical standards to Christian claims that we apply to everything else — no more, but also no less. It means presenting objections in their strongest form before attempting any response. It means distinguishing what we know with confidence from what remains genuinely uncertain. And it means trusting you, as a serious adult learner, to follow the argument and form your own judgment.
By the end of this course, you won't just know what Christians believe. You'll understand why those beliefs took the shape they did, how they've been tested, how they compare to the alternatives, and what it would mean to hold them — or reject them — on good grounds. Whatever you conclude, you'll conclude it with greater clarity, greater rigor, and greater intellectual integrity than when you started. I can't think of a more worthwhile outcome. I hope you'll join me.
— Theoria
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- 6 modules, 26 lessons
- AI-adaptive lessons tuned to your level
- Quizzes & checkpoints to lock in progress
- Your own AI learning coach
- Learn on any device, at your pace
- Full access for as long as you're subscribed
