Charles Spurgeon Commentary Romans 7:5

"For when we were in the flesh, the sinful passions, which were through the law, wrought in our members to bring forth fruit unto death." — Romans 7:5 (ASV)

Sin is the transgression of the law. Therefore, out of the law, by reason of our corruption, springs sin. And, in our past lives, we did indeed find sin to be very fruitful. It grew very fast in our members, and it brought forth much fruit unto death.