For when the Gentiles, which have not the law, do by nature the things contained in the law, these, having not the law, are a law unto themselves:
For when the Gentiles ... - q.d., 'As touching the Jews, in whose ears the written law is continually resounding, the condemnation of as many of them as are found sinners at the last involves no difficulty; but even as respects the pagan, when they
Which have not the law - who are strangers to the law in its positive and written form,
Do by nature the things contained in the law - abstaining from some of the things which are condemned, and practicing some of the things enjoined by universal morality, "these, having not the law, are a law unto themselves:"