Romans 5:12-21

(12-21) Contrast between the reign of death introduced by the sin of Adam, and the reign of life introduced by the atonement of Christ.
The sequence is, first sin, then death. Now, the death which passed over mankind had its origin in Adam’s sin. Strictly speaking, there could be no individual sin till there was a law to be broken. But in the interval between Adam and Moses, i.e., before the institution of law, death prevailed, over the world. which was a proof that there was sin somewhere. The solution is, that the sin in question was not the individual guilt of individual transgressors, but the single transgression of Adam. Here, then, is the contrast. The single sin of the one man, Adam, brought death upon all mankind; the single act of the one Redeemer cleared away many offences — also for all men. Under the old dispensation law entered in to intensify the evil; but, in like manner, under the new, grace has come in to enhance and multiply the benefit. Thus the remedial system and the condemnatory system are co-extensive, the one over against the other, and the first entirely cancels the second.