So then as through one trespass the judgment came unto all men to condemnation; even so through one act of righteousness the free gift came unto all men to justification of life.
COMPARISON AND CONTRAST BETWEEN ADAM AND CHRIST IN THEIR RELATION TO THE HUMAN FAMILY. (Rom 5:12-21) Wherefore--that is, Things being so; referring back to the whole preceding argument. as by one man--Adam. sin--considered here in its guilt, criminality, penal desert. entered into the world, and death by sin--as the penalty of sin.
Commenting on Romans 5:12-21
Therefore--now at length resuming the unfinished comparison of Rom 5:12, in order to give formally the concluding member of it, which had been done once and again substantially, in the intermediate verses. as by the offence of one judgment came--or, more simply, "it came." upon all men to condenmation; even so by the righteousness of one the free gift came--rather, "it came." upon all men...
Observe, here, How the apostle informs us of a truth, which all the writing of philosophers never acquainted us with; namely, the meritorious imputation of Adam's sin to all his posterity; that all mankind sinned in Adam, and became obnoxious to death, and all other calamities and miseries, as a punishment for their sin.