Romans 7:7
7What shall we say then? Is the law sin? May it never be! However, I wouldn’t have known sin except through the law. For I wouldn’t have known coveting unless the law had said, “You shall not covet.”
Paul asks whether the law is sin. Wesley: this begins a digression to the next chapter, in which the apostle assumes the character of a man first ignorant of the law, then under it and sincerely, but ineffectually, striving to serve God. The law is not sin; it made lust known—evil desire that did not appear until stirred by the prohibition.
Arminians agree that the law is not the culprit. Knowledge of sin comes by the commandment. The “I” is already Wesley’s assumed speaker of 7:7–25: not the gospel-believer walking in the Spirit (8:2), but the man the law is exposing.
Calvin: “Is the law sin?” means, Does it so produce sin that its guilt ought to be imputed to the law? Sin dwells in us, not in the law; we come to know it by the knowledge of God’s righteousness revealed in the law. Coveting lay hidden under hypocrisy until the tenth commandment named it.
The law’s work is holy diagnosis. Men retain a distinction in external works; coveting is more hidden. Paul is not blaming Moses; he is confessing how the commandment found him out. Both camps refuse to make the law the sinner.