Where Sin Abounded
18 So then as through one trespass, all men were condemned; even so through one act of righteousness, all men were justified to life. 19 For as through the one man’s disobedience many were made sinners, even so through the obedience of the one, many will be made righteous. 20 The law came in that the trespass might abound; but where sin abounded, grace abounded more exceedingly, 21 that as sin reigned in death, even so grace might reign through righteousness to eternal life through Jesus Christ our Lord.
The two-Adam summary lands in strict parallel, the law's entry is explained, and grace out-abounds sin to reign through righteousness.
So then as through one trespass, all men were condemned; even so through one act of righteousness, all men were justified to life.
The comparison closes in its tightest form: one trespass, condemnation touching all; one act of righteousness, justification to life. The one act gathers the whole obedience of Christ to its point — the letter has already located it in his blood Romans 5:9 — and verse 19 restates the mechanism with the verb that matters: as through the one man's disobedience many were made sinners, even so through the obedience of the one, many will be made righteous.
Made — constituted, standing established by another's act. Nobody voted for Adam's headship, and no one earns Christ's; each is a history a person is placed in, one by descent, one by faith Romans 5:17. The parallel all... all states the offer's reach; the receiving clause of verse 17 states its condition; and the letter holds both without blushing.
Then the question the whole two-Adam scheme raises for Israel: where does Sinai fit, if the decisive acts are Adam's and Christ's? Verse 20 answers with a verb of entry: the law came in — came in alongside, entered a story already running — that the trespass might abound.
The purpose clause is severe and exact. The law did not create sin; it converted sin into trespass — measured, charged, undeniable Romans 5:13 — and so made the abounding visible, the way a floodline painted on a wall makes a flood measurable. Diagnosis at full resolution: that was the law's entry assignment Romans 3:20, and chapter 7 will defend its holiness in the same breath Romans 7:13.
And then the sentence the paragraph was built to reach: but where sin abounded, grace abounded more exceedingly Romans 5:20.
The Greek piles the prefix on: super-abounded. Wherever sin rose, grace overtopped it — no floodline reaches higher than the mercy. And the close crowns the chapter's royal language: that as sin reigned in death, even so grace might reign through righteousness to eternal life through Jesus Christ our Lord Romans 5:21. Grace reigns — but through righteousness, never around it: the throne changed occupants without the law losing its honor. Which is exactly the claim the next chapter must defend against its obvious abuse Romans 6:1.
settled What this mark means