Commentary on Genesis, Vol. 2: Luther on Sin and the Flood — Edition Insights

The Bound Will and the 'Cyclopeans'

Luther devotes considerable space to attacking those who defend free will apart from grace. He calls them 'Cyclopeans'—mythological giants with a single eye—who 'oppose the Word of God and proclaim their freedom of will.' The polemic is not merely rhetorical; it drives his exegesis. For Luther, the flood narrative proves that humanity left to itself produces only evil. He cites Psalm 14, Psalm 116, and Romans 11 to argue that Scripture 'emphatically forces the conclusion that we all, without the Holy Spirit, can do nothing but err and sin.' The only remedy is despair of self and trust in Christ alone.

Cain, Seth, and the Two Humanities

The commentary traces two lineages: Cain's murderous line and Seth's line of those who 'call upon the name of the Lord.' Luther reads these genealogies not as mere history but as typological patterns. Cain's descendants build cities and advance culture, yet their civilization is judged. Seth's line, by contrast, preserves the promise. Luther's treatment is careful to note that the distinction is not ethnic but spiritual: the true church exists as a remnant within the broader world. This contrast prepares for the flood, which destroys the ungodly while saving Noah's family—a pattern Luther sees repeated in his own time.

The Flood as Judgment and Covenant

Luther interprets the flood as both universal judgment and the occasion for a new covenant. He emphasizes that God's promise never to send another such flood is unconditional, grounded in divine mercy rather than human merit. The rainbow is a 'sign' of this covenant, meant to reassure believers. Yet Luther also warns against complacency: the same God who saves also judges. He draws parallels between Noah's preaching and the Reformation, presenting Noah as a preacher of righteousness ignored by a hardened world. The flood thus becomes a mirror for readers to examine their own response to God's word.

Noah's Fall and the Curse of Ham

Luther does not gloss over Noah's drunkenness and Ham's disrespect. He treats the incident as a sobering reminder that even the righteous are prone to sin after great deliverance. The curse on Canaan, Ham's son, is interpreted as a prophecy of servitude, but Luther is careful to limit its application: it does not justify enslaving all descendants of Ham. Rather, the episode illustrates how sin spreads and how God's judgments are often mediated through family lines. Luther's handling of this difficult passage is notably restrained, focusing on the moral lesson rather than speculative ethnography.

Readers approaching this volume should expect a dense, polemical commentary that treats Genesis as a living theological document. Luther's arguments are shaped by his conflict with the Roman Church and his conviction that Scripture alone teaches salvation by grace. The translation by John Nicholas Lenker preserves Luther's forceful, often colloquial style. Those unfamiliar with Reformation debates may find the tone harsh, but the core insight—that human beings are radically dependent on God's mercy—remains the driving concern of every page.

I keep thinking about Luther’s insistence that the flood wasn’t just wrath, but a strange kind of promise—how judgment and mercy tangle together when you read closely. It reminded me of sitting with A Plain Introduction to the Criticism of the New Testament, Vol. II. — Context and Discussion, where you see how the text’s rough edges hold a quieter faithfulness. Both left me with a slower, humbler way of reading.