Book of Concord study · Healing
Repentance
Psalm 6 · Isaiah 38:1–20 · Smalcald Articles, Part III, Article III
The Texts
Psalm
"O Lord, heal me, for my bones are vexed." (v. 2)
Reading
"You have cast all my sins behind your back." (v. 17)
Book of Concord
Smalcald Articles, Part III, Article III
Psalm 6 does not open with measured theology. It opens with broken bones and a bed soaked in tears. Philip Melanchthon, defending Luther's doctrine of repentance in the Apology of the Augsburg Confession, cited Psalm 6:2–3 and Isaiah 38:10, 13 as examples of true contrition and the terrors of conscience the Law of God produces. He did not choose them for their poetry. He chose them because they are documents of men on whom the hammer has actually fallen.
Hezekiah's prayer from the brink of death traces the complete arc. "As a lion, so will He break all my bones" is the Law at full force. Verse 17 answers it with the Gospel at full force: God has held back his life from the pit and cast every sin behind His back. The Smalcald Articles do not point to these texts as illustrations of a doctrine. They are the doctrine in its original, pre-systematic form.
Discuss
The Apology of the Augsburg Confession cites Psalm 6:2–3 and Isaiah 38:10 and 13 as examples of true contrition and the terrors of conscience. What do these texts show about sorrow and conscience that a straightforward list of moral failures alone cannot?
Key Terms
| Term | What It Means |
|---|---|
| Passiva contritio | Contrition received, not performed. The Law of God strikes the conscience; God produces the sorrow in the sinner. |
| Activa contritio | Rome's demand that the sinner manufacture sorrow by meditating on his own sinful desires. |
| Attrition | Rome's fallback: a lesser fear of punishment accepted in place of full contrition when brought to the priest. |
| Satisfaction | Rome's third part: penances performed to repay God for sin, with the unpaid remainder deferred to purgatory. |
Discuss
Rome taught that if a sinner could not produce sufficient contrition, the lesser fear of punishment called attrition would do. Luther called this "a manufactured and fictitious thought." What is the practical difference between a congregation that comes to confession afraid of hell and one that has been broken by the Law itself?
The Thunderbolt and the Heap
Luther's language in the Smalcald Articles is not pastoral softness. He calls the Law of God a thunderbolt and a "hammer that breaketh the rock in pieces." It strikes manifest sinners and self-righteous hypocrites alike, driving both into genuine terror and a "sensation of death." This is passiva contritio, passive contrition: sorrow that cannot be manufactured, only received. Rome's activa contritio demanded that the sinner generate his own remorse by meditating on his lusts and desires. Luther's verdict is blunt: left to themselves, men would keep sinning if there were no penalty. Manufactured grief is hypocrisy, not repentance.
The second part of Rome's system made things worse. Confession required the explicit enumeration of every sin committed over the year. If a sin was forgotten, the conscience remained in torment, never knowing whether the accounting was complete. Luther's answer is total: true confession does not debate what is or is not a sin. It hurls "everything on a heap" and declares the whole nature sinful. Nothing is excluded and nothing is forgotten, for the entire self is confessed at once, and the eye is freed to look toward Christ rather than inward toward memory.
Discuss
Luther argues that requiring the enumeration of every individual sin places the burden of assurance on the sinner's memory rather than on Christ's absolution. Where do your people carry that same burden today, even if they have never heard of auricular confession?
The Satisfaction
The most intricate and destructive part of Rome's system was satisfaction. After confession, the penitent performed works, fasting, prayers, almsgiving, to repay God for sin. No one could know how much satisfaction a single sin required. Priests assigned token penances and directed the unpaid remainder to purgatory, which exists precisely to collect what the living could not finish. The entire structure forced the conscience to rest its confidence in its own works, with no solid ground beneath it.
Luther's response is not a negotiation but a demolition. The satisfaction for sin, he writes, "cannot be uncertain, because it is not our uncertain, sinful work, but it is the suffering and blood of the innocent Lamb of God who taketh away the sin of the world." Isaiah 38:17 announces exactly this: God has cast all sin behind His back, not reduced it, not deferred it, not put it on installment. The image is not diminished divine attention. It is total and objective acquittal grounded in someone else's suffering.
Discuss
If purgatory is the logical endpoint of any system that leaves satisfaction in human hands, what is the pastoral endpoint of a Gospel that announces the Lamb's satisfaction as complete and certain? How does Isaiah 38:17 speak to a conscience that is still trying to settle the account?
Law Without the Promise
The Smalcald Articles carry an explicit warning: the Law applied without the promise of the Gospel does not produce repentance. It produces destruction. "If the Law alone exercises its office, death and hell follow, and man must despair, as Saul and Judas." Psalm 6 knows this edge. The psalmist does not remain under the hammer; in verse 4 he turns: "Return, O Lord, deliver my soul: oh save me for your mercies' sake." That turn is not a change of subject. It is the entire point. The terrors of conscience are the Law's proper work, but they are preparatory, not final. Christ's own words in Mark 1:15 join the two inseparably: "Repent and believe the Gospel."
Discuss
Luther says the Law without the Gospel produces Judas, not Peter. Both men were crushed by their sin. What was the difference, and where do you see that same fork in the road in the people you pastor?
The Payoff
Every shattered bone in Psalm 6, every lion-torn sinew in Hezekiah's prayer, every sin cast behind God's back finds its resolution not in a penance, not in a purgatory, not in a sufficiently grieved conscience, but in the body broken and the blood poured out on the cross of Jesus Christ, in whom the full weight of the Law was borne and the full promise of the Gospel was sealed forever.