John Wesley 
The Original, Nature, Property, and Use of the Law 

Perhaps there are few subjects within the whole compass of religion so little understood as this. The reader of this Epistle is usually told, by the law St. Paul means the Jewish law; and so, apprehending himself to have no concern therewith, passes on without farther thought about it. Indeed some are not satisfied with this account; but observing the Epistle is directed to the Romans, thence infer that the Apostle in the beginning of this chapter alludes to the old Roman law. But as they have no more concern with this, than with the ceremonial law of Moses, so they spend not much thought on what they suppose is occasionally mentioned barely to illustrate another thing.