Now we command you, brothers, in the name of our Lord Jesus Christ, that you withdraw yourselves from every brother who walks in rebellion, and not after the tradition which they received from us.
 Thus it is shown that the Lord will deal with all on earth, not merged in one, but discriminated; for He executes judgment, and hence does not confound those who differ in a common class. There is thus a definite distinction drawn; but this so much the more precisely leaves out the Christian. Its force is more understood the more it is weighed. The apostle does not declare all at once, but prepares the way with much circumspection. When he says "them that know not God," he means the idolatrous Gentiles. Then he adds with another article, "and those that obey not the gospel of our Lord Jesus Christ" (not, as we have it in English here, "and that obey not the gospel of our Lord Jesus;" as if all were one and the same class). There are two classes, and therefore accuracy would seem to call on us to make the sense more definite "and on them that obey not the gospel of our Lord Jesus Christ." At all events, whatever mode of rendering may be preferred, I have no hesitation in saying that such is the sense of the Greek, and nothing else. They are the Gentiles, who knew not God, (or, as Bengel has it, "qui in ethnica ignorantia de Deo versantur,") and the Jews, who might know God after a sort and to a certain point beyond Gentiles, but who did not obey the gospel of our Lord Jesus Christ. ("Judaeis maxime, quibus evangelium de  Christo praedicatum fuerat.") For unbelief is always convicted by the test that God employs; and the day of the Lord will deal with every form. The Gentiles that know not God will be punished, and the Jews that abuse the forms of Old Testament revelation to disobey the gospel will not escape, still less nominal and apostate Christendom.
