Understand sin — and everything else becomes clearer
A rigorous, doctrinally serious study of hamartiology — tracing sin's origin, nature, and consequences through Scripture, historical theology, and the great Christian tradition, so you can build a theological framework that actually holds.

"Get sin right, and the whole architecture of grace becomes something you can actually see."
— Theoria

What you'll learn
What you'll be able to do
- Interpret the Genesis 3 account of the Fall and articulate its foundational significance for the whole of Christian doctrine
- Trace the biblical development of sin, guilt, shame, alienation, and judgment from the Old Testament through the New Testament
- Evaluate competing Christian positions — including Augustinian, Reformed, Arminian, and Wesleyan perspectives — on original sin, total depravity, and prevenient grace
- Analyze how sin affects the human will, intellect, conscience, and moral responsibility, drawing on Scripture and historical theology
- Apply the doctrine of sin to contemporary questions in ethics, psychology, social injustice, systemic evil, and human flourishing
- Articulate a coherent, biblically grounded hamartiological framework that serves as a foundation for understanding grace, Christology, and soteriology
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 · 29 lessons

Foundations: What Is Sin and Why Does It Matter?
Establishes the theological stakes of hamartiology and orients students to its place within systematic theology and the Christian life.
- 1.1Hamartiology in the Map of Systematic TheologyIncluded
- 1.2The Biblical Vocabulary of SinIncluded
- 1.3Sin as Theological Reality, Not Mere Moral FailureIncluded
- 1.4A Brief History of Hamartiological ThoughtIncluded
The Origin of Sin: The Fall and Its Meaning
Examines the Genesis 3 account of the Fall in depth — its literary context, theological content, and enduring significance for the human condition.
- 2.1Genesis 1–2: Creation, Covenant, and the Goodness of GodIncluded
- 2.2Genesis 3: The Anatomy of the TemptationIncluded
- 2.3The Immediate Consequences of the FallIncluded
- 2.4The Protoevangelium and the First Glimpse of GraceIncluded
- 2.5The Fall of Satan and the Origin of Evil Before EdenIncluded
The Biblical Portrait of Sin: Old Testament to New Testament
Traces the consistent yet deepening biblical theology of sin, guilt, shame, alienation, and judgment across both Testaments.
- 3.1Sin in the Primeval History: Cain Through BabelIncluded
- 3.2Torah, Covenant, and the Revelation of Sin's SeriousnessIncluded
- 3.3Sin, Guilt, and Lament in the Psalms and ProphetsIncluded
- 3.4Sin in the Gospels: Jesus's Diagnosis of the Human HeartIncluded
- 3.5Romans 1–3 and 5–8: Paul's Comprehensive Theology of SinIncluded
Original Sin, Inherited Corruption, and Human Depravity
Investigates the major theological questions surrounding how Adam's sin is transmitted to and constitutes the condition of all humanity.
- 4.1Augustine and the Formation of Original Sin DoctrineIncluded
- 4.2Pelagianism, Semi-Pelagianism, and the Council of OrangeIncluded
- 4.3Reformed Theology: Total Depravity and Radical CorruptionIncluded
- 4.4Arminian and Wesleyan Perspectives: Prevenient Grace and Moral ResponsibilityIncluded
- 4.5Models of Original Sin's Transmission: Realism, Federalism, and BeyondIncluded
Sin, the Self, and Moral Responsibility
Examines how sin corrupts the inner dimensions of human personhood — will, intellect, conscience, and freedom — and what this means for moral accountability.
- 5.1The Noetic Effects of Sin: How Sin Distorts the MindIncluded
- 5.2The Will in Bondage: Human Freedom After the FallIncluded
- 5.3Conscience, Moral Awareness, and the Remnants of the ImageIncluded
- 5.4Temptation, Concupiscence, and the Mechanics of Personal SinIncluded
- 5.5Guilt, Shame, and the Pastoral Dimensions of Moral FailureIncluded
Sin in the World: Systemic Evil, Contemporary Questions, and Hamartiological Foundations for Grace
Applies the doctrine of sin to social, ethical, and cultural realities, and anchors hamartiology in its essential relationship to grace, Christ, and salvation.
- 6.1Structural and Systemic Sin: Beyond Individual Moral FailureIncluded
- 6.2Sin, Addiction, and the Psychology of Human BondageIncluded
- 6.3Sin, Suffering, and the Problem of EvilIncluded
- 6.4Karl Barth and Contemporary Evangelical HamartiologiesIncluded
- 6.5From Hamartiology to Soteriology: Sin as the Foundation of GraceIncluded
Who it's for
Is this you?
Seminary students
Going deeper than their survey courses allow, they need a rigorous hamartiological foundation that holds up under exegetical and historical scrutiny.
Working pastors
They preach grace every week and need a doctrinally precise account of sin to give that grace its full biblical weight — in the pulpit and the counseling room.
Independent theologians
Serious self-directed learners who want to engage Augustine, the Reformers, and contemporary hamartiologies on their own terms, without a classroom gatekeeping the depth.
Reformed & Arminian debaters
They want to understand total depravity, prevenient grace, and original sin's transmission not as slogans but as carefully argued positions with real exegetical stakes.
Ethics & justice thinkers
They're wrestling with structural evil, systemic injustice, and the psychology of moral failure and want a theological framework that goes beyond individual moralizing.
Mature lay leaders
Seasoned in their faith and no longer satisfied with popular-level answers, they're ready to engage the doctrine of sin with the seriousness it demands.
Questions
Frequently asked
Your teacher
A note from your teacher

Theoria
There is a particular kind of frustration that serious theological students know well: you pick up a book on sin, and within a few pages it has either reduced the doctrine to a morality lesson, dissolved it into therapeutic categories, or skipped past it in haste to get to the more comfortable territory of grace. I understand that frustration, because I've felt it myself — and it's what drove me to develop this curriculum.
Sin is not a comfortable doctrine. But it is an indispensable one. Every major locus of Christian theology — Christology, atonement, soteriology, eschatology, even the doctrine of God — assumes a hamartiological foundation. Get sin wrong and you get grace wrong. Get grace wrong and you have, at best, a diminished gospel. This school exists because the doctrine deserves the same rigorous, historically informed, exegetically grounded treatment that we give to any other serious locus of systematic theology.
What I've tried to build here is a course of study that holds two things together without sacrificing either: intellectual precision and pastoral seriousness. We will work carefully through the Hebrew and Greek vocabulary of sin. We will sit with Genesis 3 long enough to understand why it is the theological hinge of the entire canon. We will trace the doctrine from Augustine through the Reformation and into contemporary evangelical and ecumenical debates — not as a history exercise, but because the tradition is a resource, and because understanding where disagreements come from is essential to evaluating them honestly. And we will not flinch from the hard questions: the bondage of the will, the noetic effects of sin, the reality of systemic evil, the relationship between sin and suffering.
I've also designed this school for the questions that don't often make it into the textbooks: What does hamartiology say to the person in the grip of addiction? How does a doctrine of structural sin engage with questions of social justice without collapsing into mere sociology? What is the difference between guilt and shame, and why does that distinction matter in pastoral care? These are not peripheral questions — they are where theology meets life, and they deserve answers grounded in Scripture and serious theological reflection.
If you are a seminary student looking to go deeper than your survey course allows, a pastor who wants a more secure doctrinal foundation for your preaching and counseling, or a theologically curious Christian who simply refuses to settle for surface-level answers — this school was built for you. Come ready to think carefully, engage primary sources honestly, and let a right understanding of sin open up a richer, more luminous understanding of grace.
— Theoria
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- 6 modules, 29 lessons
- AI-adaptive lessons tuned to your level
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