so that, as sin reigned in death, grace also might reign through righteousness leading to eternal life through Jesus Christ our Lord.
21. That as sin has reigned, etc. As sin is said to be the sting of death, and as death has no power over men, except on account of sin; so sin executes its power by death: it is hence said to exercise thereby its dominion. In the last clause the order of the words is deranged, but yet not without reason.
The apostle here describes the fountain and foundation of justification, laid in the death of the Lord Jesus. The streams are very sweet, but, if you run them up to the spring-head, you will find it to be Christ's dying for us; it is in the precious stream of Christ's blood that all these privileges come flowing to us: and therefore he enlarges upon this...
Commenting on Romans 5:6-21
That as sin hath reigned unto death,.... This is another end of the law's entrance, or rather an illustration of the grace of God, by comparing the reigns of sin and grace together: sin has such a power over man in a state of nature, as amounts to a dominion; it has not only an enticing, ensnaring power, to draw into a compliance with it...