A Misdiagnosis
In 1982, two Australian doctors upended gastroenterology with a discovery: stomach ulcers, long treated with medications, bland diets, and stress reduction, weren’t caused by excess acid. The real culprit was a bacterium. Treat the bacteria, and the ulcers disappeared.
This illustrates a principle far wider than medicine: when we focus on symptoms, we misdiagnose the root cause. Nowhere does this cost more than in our understanding of sin — and of the gospel that addresses it.
Humanity’s Ulcer
Most people agree humanity has a problem. War, injustice, greed, despair — the symptoms are everywhere. But what is the cause?
The Christian answer is original sin. But a superficial diagnosis oversimplifies it. We may treat the symptoms while leaving the bacterium untouched.
What Is Sin — Really?
Most people recognize they fall short of their own moral standards. Christians often frame this against the Ten Commandments. But if we define sin too narrowly — as mere moral failure — we risk misdiagnosing the human condition and underrepresenting the gospel.
When Paul wrote to the Colossians, he described their former condition in three dimensions: alienated from God (a relational issue), hostile toward God (a political issue), and engaged in evil deeds (a moral issue). In one statement, he identified both the symptoms and the cause.
The most common biblical words for sin — Hebrew chāṭāʼ and Greek hamartia — both mean “to miss the mark.” But this raises a critical question: what is the target?
Romans 3:23 is precise: “All have sinned and fall short of the glory of God.” Most read this as breaking God’s moral rules, which is not wrong but incomplete. The glory of God encompasses his character and holiness, the dignity and destiny he assigned humanity at creation, and his sovereign authority and purpose. Sin, then, is not merely moral failure. It is a failure of identity, purpose, and allegiance: a comprehensive rupture with God, with ourselves, and with our created design.
The Heart of the Matter
If behavior is the fruit, what is the root? Scripture is consistent: the heart.
Jeremiah cuts through surface behavior to the inner condition: “The heart is more deceitful than all else and is desperately sick” (17:9). In biblical anthropology, the heart is the integrated center of thought, will, desire, and moral orientation. Jeremiah’s diagnosis is blunt; it is beyond self-repair.
Jesus builds on this: “From within, out of the heart of men, proceed evil thoughts… immorality, theft, murder” (Mark 7:21–23). What comes out of a person flows from what is already inside. Sinful behaviors are downstream from a disordered heart.
This matters immensely. A gospel that addresses only behavior treats the fruit while leaving the root untouched.
From Diseased Heart to Enthroned Self
What exactly is wrong with the heart? The disease is not primarily weakness or ignorance. It is self-enthronement — the heart’s insistence on governing itself, placing the self at the center where God alone belongs.
This is the thread running from the Garden forward. Adam and Eve didn’t simply make a mistake. They chose their own judgment over God’s word, their own rule over His. Frank Sinatra’s My Way is, theologically speaking, the anthem of the Fall — I will govern myself. What felt like freedom was actually slavery. In grasping for autonomy, they became enslaved to sin and a kingdom oriented entirely around the self.
A.W. Tozer captured it plainly: “A moral being, created to worship before the throne of God, sits on the throne of his own selfhood and declares, ‘I AM’.” R.C. Sproul added: “Every sin, no matter how seemingly insignificant, is an act of treason against the cosmic King.”
Their shared conclusion: humanity’s core problem is not primarily immorality — it is autonomy. Self-rule.
The Tale of Two Kings
Two kings illustrate this vividly. When Samuel rebuked Saul for disobedience, he named the root: rebellion and insubordination. Saul responded with excuses and managed his appearances. He treated the symptom. The disease remained.
When Nathan confronted David — not just for adultery and murder, but for despising God himself — David’s response was Psalm 51: “Create in me a clean heart, O God.” David understood the problem went deeper than behavior, and so did his prayer.
Saul managed his sin. David repented of his sin nature. The gospel calls us to David’s posture.
The Gospel’s Cure: More Than Forgiveness
If this is the diagnosis, the gospel must be as large as the problem it addresses.
If sin were merely moral failure, forgiveness would be sufficient — pay the debt, clear the record. But sin is far more. It is a diseased heart, rebellion, misdirected worship, a self enthroned where God belongs.
Paul describes the transaction in Colossians 1:13–14: God “has delivered us from the domain of darkness and transferred us to the kingdom of his beloved Son, in whom we have redemption, the forgiveness of sins.”
Notice the scope. This is not only forgiveness — it is a kingdom transfer. A change of dominion. A reorientation of allegiance. The rebel is not merely pardoned; he is brought home and given a new identity as a citizen of a new kingdom. Jesus doesn’t merely forgive rebels. He recruits them, redeems them, and restores the proper order of their loves — re-enthroning God at the center of a life built to worship him.
The gospel is not merely about getting us into heaven. It is about bringing us under a new King.
Summary
A superficial diagnosis of sin is one of the most dangerous distortions of the gospel. When we reduce sin to behavior and morality, we treat symptoms while ignoring the root. Humanity’s core problem is not merely wrongdoing; it is rebellion. A dethroned God. An enthroned self.
The cure is as deep as the disease. Rebels can come home.
Summary: Gospel Pathogens and Their Cure
Throughout this series, we have been identifying what we might call gospel pathogens—distortions that weaken, shrink, or misdirect the message of the gospel.
Like a medical misdiagnosis, each of these pathogens alters how we understand and present the gospel.
What we have seen in this article is that one of the most dangerous distortions is a superficial diagnosis of sin. But it is not the only one.
1. Fragmentism (TADB 150)
Effect: Reduces the gospel narrative to only a few events, often isolating the cross from the larger story.
Cure: Recover and proclaim the full narrative of Jesus—the complete story of the Risen King (see TADB 138–144).
2. Reductionism (TADB 151)
Effect: Shrinks the meaning of the cross to atonement alone—offering forgiveness while neglecting Christ’s victory over sin, death, and Satan.
Cure: Proclaim the cross in its fullness—both atonement and victory (Christus Victor).
3. Narcissism (TADB 157)
Effect: Re-centers the gospel on personal benefit, turning it into a message about me rather than about the King and His kingdom.
Cure: Recover the gospel as reconciliation with the King and a transfer of allegiance—from the kingdom of darkness into the kingdom of light.
4. Superficialism (TADB 158)
Effect: Reduces sin to behavior and morality, treating symptoms while ignoring the root.
Cure: Recognize that humanity’s core problem is not merely wrongdoing but rebellion—a dethroned God and an enthroned self that requires a new heart and a new King.
Coming Next
In future blogs, we will explore other gospel pathogens such as Syncretism, Postmodernism, and Commercialism, examining their effects and cures.
For Reflection
1. Why do you think people tend to focus on symptoms rather than root causes—both medically and spiritually?
2. In your own words, how would you define sin after reading this article? How is that different from how you’ve thought about it before?
3. Jesus says that sin flows from the heart (Mark 7:21–23). How does that challenge the idea that our main problem is behavior or environment?
4. What does “self-enthronement” look like in everyday life? Where do you see it in yourself or in culture?
5. How does viewing sin as rebellion (not just rule-breaking) change how you understand the gospel?