Psalm 90 is the oldest psalm in the Psalter and the only one attributed to Moses, and it opens with the starkest possible account of what human life looks like under God's judgment on sin. From everlasting to everlasting you are God; a thousand years in your sight are like a watch in the night. Man is swept away in sleep, like grass renewed in the morning and withered by evening. You have consumed us by your anger, terrified us by your wrath; you have set our iniquities before you, our secret sins in the light of your presence. The years of our life are seventy, or eighty if strength permits, and all of it is toil and trouble. Psalm 90 does not suggest that the human condition is mostly fine with a few areas for improvement. It describes a nature under sentence, swept away by the anger of God at iniquity.
Deuteronomy 33's final blessing on the tribes arrives from the other side of the same reality. Moses has seen what God's anger at iniquity does to human life; Psalm 90 is his meditation on it. His final word to Israel is not an exhortation to do better but a declaration of what God has done: "Blessed are you, O Israel! Who is like you, a people saved by the Lord." The blessing is entirely passive. Israel is not a people who saved themselves; they are a people saved by the Lord. Smalcald Articles Part III, Article I, treats sin with the same unflinching honesty as Psalm 90, and for the same reason: only a diagnosis that is honest about the depth of the disease can comprehend the magnitude of the rescue Deuteronomy 33 announces.
| Term | What It Means |
|---|---|
| Original Sin as Deep Corruption | Luther's insistence that original sin is not merely a juridical guilt inherited from Adam but a present, total corruption of human nature so thorough that reason itself cannot diagnose it. Only Scripture's revelation makes the disease visible in its full depth. |
| Root and Fruits | The Smalcald Articles' distinction between original sin (the root) and actual sins (the fruits). Significantly, Luther lists spiritual fruits first: unbelief, false faith, idolatry, contempt of God, presumption, despair. Outward moral failures come second. |
| Heathen Dogmas | Luther's name for the Scholastic optimism he refutes: that natural reason is uncorrupted, that man has a free will capable of choosing good, and that doing as much as is in him earns God's grace. These are not imperfect theology; they are pagan religion dressed in Christian vocabulary. |
| Minimizing the Disease / Losing the Physician | The Apology's warning: the magnitude of Christ's grace cannot be understood unless our diseases are recognized. A reduced view of sin produces a reduced Gospel, a Christ who died for a problem that is not actually fatal. |
Smalcald Articles Part III, Article I, opens with a statement that cuts against every optimistic anthropology: original sin is not a past historical event that set humanity on a slightly disadvantaged trajectory. It is a present, inherited corruption in which every person born of Adam is implicated from conception. By Adam's disobedience all men were made sinners and subject to death and the devil. The nature itself is corrupted, not merely the choices it makes. This is why Psalm 90 does not describe people who are making bad decisions; it describes a kind of being that is under sentence, swept away by God's wrath, consumed in seventy or eighty years of toil and trouble. Luther adds a precise epistemological point: this corruption is so thorough that human reason cannot diagnose its own condition. Reason can observe the outward symptoms of Psalm 90, the brevity of life, the universality of suffering, the presence of mortality, but it cannot identify the root cause as a nature entirely alienated from God. That diagnosis requires revelation. The Scriptures alone make visible what reason is incapable of seeing about itself. This means that the person who has not heard the Law's diagnosis of original sin delivered by the Word of God does not have an incomplete picture of the human condition; he or she has a fundamentally false one, flattering to the self and hostile to the Gospel.
The Smalcald Articles' account of original sin is shaped by a specific polemical target: the Scholastic theology that had so thoroughly infiltrated medieval Christianity that it was taken for granted as simply common sense. The Schoolmen taught that since Adam's fall the natural powers of man have remained entire and uncorrupted, that man by nature has a right reason and a good will, and that if a person simply does as much as is in him, God will certainly grant him grace. Luther's response is to name these ideas for what they are: truly heathen dogmas arising from complete blindness and ignorance regarding both sin and Christ. The label is not rhetorical excess. If human reason is essentially uncorrupted and the will is capable of choosing good, then Christianity differs from the best pagan philosophy only in degree, not in kind. A person who needs only to do as much as is in him to receive grace is a person who can earn his way to God by maximal effort. The cross becomes, in this scheme, an inspiring example or a helpful supplement rather than the only rescue from a fatal condition. Moses' words in Deuteronomy 33, "a people saved by the Lord," become, under the Scholastic account, a people who did enough to qualify for divine assistance. The passive verb is replaced by cooperative effort, and the Gospel collapses into a refined moralism.
Luther's refusal to minimize sin is not fatalism or despair. It is the doctrinal prerequisite of the Gospel's power. He states the logical consequence of the Scholastic optimism directly: if man's natural powers are uncorrupted and his will is capable of good, then Christ has died in vain. Either there is no defect for which He needed to die, or He died only for the body and not for the soul, since on the Scholastic account the soul is entirely sound. The cross is reduced to a solution for a problem that is not actually fatal. The Physician has come, but the patient has been told he is not actually sick. The Apology of the Augsburg Confession states the necessary relationship between diagnosis and treatment with precision: the magnitude of Christ's grace cannot be understood unless our diseases are recognized. Deuteronomy 33's blessing, "Who is like you, a people saved by the Lord?" has its full weight only in the context of Psalm 90's account of what they were saved from: a nature under God's wrath, swept away in seventy years of toil and trouble, incapable by any natural power of restoring itself to the relationship Adam broke. The high view of sin that the Smalcald Articles insist upon is not pessimism about human possibilities; it is the clearing of the stage so that what Christ actually did can be seen in its true magnitude.
Psalm 90's last verse turns: "Let the favor of the Lord our God be upon us." The same Moses who described human life as swept away in God's anger asks for the favor of that God to rest on the work of human hands. The prayer is possible not despite the psalm's dark diagnosis but because of it: only the one who knows the full weight of Psalm 90's account can understand what it means that Deuteronomy 33's God is a shield and a sword of triumph, and that the blessing He gives to a people utterly unable to save themselves is the blessing of having been saved by Him alone, the only rescue adequate to the depth of the disease the Son of God came to cure.