Romans 5:13

For until the law sin was in the world - As death reigned from Adam to Moses, so also did sin. Now, as there was no written law from Adam to that given to Moses, the death that prevailed could not be the breach of that law; for sin, so as to be punished with temporal death, is not imputed where there is no law, which shows the penalty of sin to be death. Therefore, men are not subjected to death for their own personal transgressions, but for the sin of Adam; as, through his transgression, all come into the world with the seeds of death and corruption in their own nature, superadded to their moral depravity. All are sinful - all are mortal - and all must die.

For until the law ... - This verse, with the following verses to the 17th, is usually regarded as a parenthesis. The Law here evidently means the Law given by Moses. "Until the commencement of that administration, or state of things under the law." To see the reason why he referred to this period between Adam and the Law, we should recall the design of the apostle, which is, to show the exceeding grace of God in the gospel, abounding, and superabounding, as a complete remedy for all the evils introduced by sin. For this purpose he introduces three leading conditions, or states, where people sinned, and where the effects of sin were seen; in regard to each and all of which the grace of the gospel superabounded. The first was that of Adam, with its attendant train of ills Romans 5:12, which ills were all met by the death of Christ, Romans 5:15-18. The second period or condition was that long interval in which men had only the light of nature, that period occurring between Adam and Moses. This was a fair representation of the condition of the world without revelation, and without law, Romans 5:13-14. Sin then reigned - reigned everywhere where there was no law. But the grace of the gospel abounded over the evils of this state of man. The third was under the Law, Romans 5:20. The Law entered, and sin was increased, and its evils abounded. But the gospel of Christ abounded even over this, and grace triumphantly reigned. So that the plan of justification met all the evils of sin, and was adapted to remove them; sin and its consequences as flowing from Adam; sin and its consequences when there was no written revelation; and sin and its consequences under the light and terrors of the Law.

Sin was in the world - People sinned. They did what was evil.

But sin is not imputed - Is not charged against people, or they are not held guilty of it where there is no law. This is a self-evident proposition, for sin is a violation of law; and if there is no law, there can be no wrong. Assuming this as a self-evident proposition, the connection is, that there must have been a law of some kind; a "law written on their hearts," since sin was in the world, and people could not be charged with sin, or treated as sinners, unless there was some law. The passage here states a great and important principle, that people will not be held to be guilty unless there is a law which binds them of which they are apprized, and which they voluntarily transgress; see the note at Romans 4:15. This verse, therefore, meets an objection that might be started from what had been said in Romans 4:15. The apostle had affirmed that "where no law is there is no transgression." He here stated that all were sinners. It might be objected, that as during this long period of time they had no law, they could not be stoners. To meet this, he says that people were then in fact sinners, and were treated as such, which showed that there must have been a law.

5:13 For until the law sin was in the world - All, I say, had sinned, for sin was in the world long before the written law; but, I grant, sin is not so much imputed, nor so severely punished by God, where there is no express law to convince men of it. Yet that all had sinned, even then, appears in that all died.