Rev., literally, came in beside, giving the force of παρά beside. Very significant. Now that the parallel between Adam and Christ is closed, the question arises as to the position and office of the law. How did it stand related to Adam and Christ? Paul replies that it came in alongside of the sin. “It was taken up into the divine plan or arrangement, and made an occasion for the abounding of grace in the opening of the new way to justification and life” (Dwight).
Might abound (πλεονάσῃ)
Not primarily of the greater consciousness and acknowledgment of sin, but of the increase of actual transgression. The other thought, however, may be included. See Rom 7:7, Rom 7:8, Rom 7:9, Rom 7:11.
Did much more abound (ὑπερεπερίσσευσεν)
Lit., abounded over and above. Only here and 2Co 7:4. Compare ὑπερεπλεόνασε abounded exceedingly, 1Ti 1:14; ὑπερπερισσῶς beyond measure, Mar 7:37; ὑπεραυξάνει; groweth exceedingly, 2Th 1:3.