The apostle further writes: “Now we command you, brethren, in the name of our Lord Jesus Christ, that ye withdraw yourselves from every brother that walketh disorderly, and not after the tradition which he received from us.” 2 Thess. 3:6. And he further writes: “If any man obey not our word, signify that man by an epistle, and have no company with him, that he may be ashamed. Yet count him not as an enemy, but admonish him as a brother.” 2 Thess. 3:14,15. With this the apostle indicates, that the church is as much bound, to have nothing to do with the disobedient, as she is bound to withdraw herself from such as walk disorderly, even though the word _withdraw_ might be understood only with reference to excommunication; for as the church must withdraw herself, lest she should be leavened or defiled by such persons, so she must have nothing to do with them, that they may be ashamed. Again, the church defiles herself, when she does not avoid, since this is commanded and taught her by the apostle, for he taught this, that it should be done, as may be perceived in his epistle to the Corinthians; for he writes: “I wrote unto you in an epistle not to company with fornicators.” 1 Cor. 5:9. From this it seems that he had written them before that time; but as they did not observe it, he explained it to them more fully, for he says; Yet not altogether with the fornicators of this world, or with the covetous, or extortioners, or with idolaters; for then must ye needs go out of the world. But I have written unto you, not to keep company with these. See, he says again: I have written unto you.
From this it can well be seen, that he repeats it, in order that they should observe it better, than they had done before; for they did also not observe excommunication, because they could not avoid; for where no excommunication is, there is also no avoidance, for avoidance springs from excommunication. Hence he reproved them as being puffed up, and that they did not mourn that such heinous deeds were committed among them; and determined concerning him that had done this deed, in the name of the Lord Jesus Christ, when they were gathered together, with his spirit, and with the power of our Lord Jesus Christ, to deliver him unto Satan for the destruction of the flesh, that the spirit might be saved in the day of our Lord Jesus. Hence it is evident from this, that for whatever excommunication is good, avoidance is also good, and that they serve the same purpose. For the apostle says, that he delivered him to Satan for the destruction of the flesh, that is, for the mortification of the flesh; and concerning avoidance he says: And have no company with him, that he may be ashamed. Mark, for what this shame serves; for it serves a woman to wash herself when she is told that she is begrimed; a man, also, that is disrobed, does not want to be seen in his nakedness, for he is ashamed; hence, when some one comes that would see him, he immediately puts on his clothes, that he should not be seen in his nakedness. As Adam, when he knew that he was naked, he forthwith sought to cover himself, for he was ashamed; and he made an apron of fig leaves, to cover his shame. Now we must, according to the words of the apostle, avoid the excommunicated, that they may become ashamed; for if we withdraw ourselves from them, and avoid them, they have cause to consider why this is done, and through this considering to know their nakedness; and become ashamed before the Lord their God, against whom they have sinned, and are thus smitten in their conscience, so that in this condition they dare not appear before the Lord, and hence seek a means to cover their nakedness, but not with fig leaves, as did Adam, but with the skin of the Lamb Christ Jesus, who must be received through faith with a broken and contrite heart. As Adam, when he humbled himself, God put a coat of skins on him, to cover his nakedness. Thus, dear brother, excommunication and avoidance have the same purpose, and they are not contrary to each other; hence the apostle says: Yet count him not as an enemy, but admonish him as a brother. Admonition is not contrary to avoidance, for admonition serves to amendment, even as avoidance and excommunication serve to it. Hence the apostle does not prohibit it, but teaches that they are to be admonished as brethren; for all that is not contrary to them, namely, excommunication and avoidance, they do not prohibit; but where excommunication is, there must also be avoidance, for it proceeds from excommunication. Hence, when he wrote to the Corinthians, how they should deliver the fornicator to Satan, and purge out the old leaven, he also wrote to them: “But now I have written unto you not to keep company, if any man that is called a brother, be a fornicator, or covetous, or an idolater, or a railer, or a drunkard, or an extortioner; with such a one no not to eat. For what have I to do to judge them also that are without?” Mark, he says, _judge_; yet he had not written anything from which they might have understood, that the world should be excommunicated; but he had written that they should have no company with fornicators, and in order that they should not understand it with reference to the fornicators of the world, that one should have no company with them, he says: Yet not altogether with the fornicators of this world, or with the covetous; for then must ye needs go out of the world. For what have I to do to judge them also that are without? See, he calls it judging, that, as he said, one should have no company with them; although avoidance is not excommunication or the judgment itself, but it confirms the judgment; for when I say: You must have nothing to do with that man, I thereby declare that he is excommunicated, and all that avoid him show that he is judged. Hence he says: “Do not ye judge them that are within? But them that are without God judgeth. Therefore put away from among yourselves that wicked person.”