3. If anyone teacheth differently. The word eJterodidaskalei~, being a compound, may also, not improperly, be translated, teacheth other things. Yet there is no ambiguity as to the meaning; for he condemns all those who do not agree with this manner of teaching, although they do not openly and avowedly oppose sound doctrine. It is possible that he who does not profess any wicked or open error may yet, by endeavoring to insinuate himself by means of silly babbling, corrupt the doctrine of godliness; for, when there is no progress, and no edification in the doctrine itself, there is already a departure from the ordinance of Christ. Now although Paul does not speak of the avowed supporters of wicked doctrines, but of vain and irreligious teachers, who, by their ambition or covetousness, disfigure the plain and simple doctrine of godliness, yet we see with what sharpness and severity he attacks them. Nor need we wonder at this; for it is almost impossible to tell how much injury is done by preaching that is hypocritical and altogether framed for the purposes of ostentation and of idle display. But who they are that are blamed by him, appears more clearly from what immediately follows --

And consenteth not to sound words. This clause is intended to explain the former. It frequently happens that such men as are here described, carried away by foolish curiosity, despise everything that is useful and solid, and thus indulge in wanton freaks, like unruly horses. And what is this but to reject the sound words of Christ? for they are called "sound" or "healthful," because they give health to us, or are fitted to promote it.

And to the doctrine which is according to godliness. This has the same meaning with the former clause; for the "doctrine" will not be consistent with "godliness," if it do not instruct us in the fear and worship of God, if it do not edify our faith, if it do not train us to patience, humility, and all the duties of that love which we owe to our fellowmen. Whoever, therefore, does not strive to teach usefully, does not teach as he ought to do; and not only so, but that doctrine is neither godly nor sound, whatever may be the brilliancy of its display, that does not tend to the profit of the hearers.

4. He is puffed up, knowing nothing. Such persons Paul first charges with pride, foolish and empty pride. Next, because no punishment can be imagined that is better adapted to chastise ambitious persons than to declare that all that they delight in proves their ignorance, Paul pronounces that they know nothing, though they are swelled with many subtleties; for they have nothing that is solid, but mere wind. At the same time, he instructs all believers not to be carried away by that windy ostentation, but to remain steadfast in the simplicity of the gospel.

But languishing after questions and debates of words. There is an indirect contrast between "the soundness of the doctrine of Christ," and that "languishing;" for, when they have wearied themselves much and long with ingenious questions, what advantage do they reap from their labor, but that the disease continually grows? Thus not only do they consume their strength to no purpose, but their foolish curiosity begets this languishing; and hence it follows, that they are very far from profiting aright, as the disciples of Christ ought to do.

Not without reason does the Apostle connect "questions and disputes of words;" for by the former term he does not mean every kind of questions, which either arise from a sober and moderate desire to learn, or contribute to clear explanation of useful things, but to such questions as are agitated, in the present day, in the schools of the Sorbonne, for displaying acuteness of intellect. There one question gives rise to another; for there is no limit to them, when every person, desiring to know more than is proper, indulges his vanity; and hence, there afterwards arise innumerable quarrels. As the thick clouds, during hot weather, are not dispelled without thunder, so those thorny questions must burst into disputes.

He gives the name logomaci>av (logomachies, or disputes about words) to contentious disputes about words rather than things, or, as it is commonly expressed, without substance or foundation; for if any person carefully inquire what sort of contentions are burning among the sophists, he will perceive that they do not arise from realities, but are framed out of nothing. In a word, Paul intended to condemn all questions which sharpen us for disputes that are of no value.

From which arises envy. He demonstrates from the effects how much an ambitious desire of knowledge ought to be avoided; for ambition is the mother of envy. Where envy reigns, there also rage brawlings, contentions, and other evils, which are here enumerated by Paul.

5. Of men corrupt in understanding, and that are destitute of the truth. It is certain that here he censures the sophists, who, neglecting edification, turn the word of God into trivial distinctions, and an art of ingenious discussion. If the Apostle only shewed that the doctrine of salvation is thus rendered useless, even that would be an intolerable profanation; but far heavier and fiercer is that reproof, when he says that evils so pernicious, and plagues so hurtful, spring from it. From this passage, therefore, let us learn to detest (sofistikh<n) sophistry as a thing more destructive to the Church of God than can easily be believed.

That godliness is gain. The meaning is, that godliness is a gainful art; that is, because they measure the whole of Christianity by gain. Just as if the oracles of the Holy Spirit had been recorded with no other design than to serve the purposes of their covetousness, they traffic in it as merchandise exposed to sale.

Withdraw thyself from such. Paul forbids the servants of Christ to have any intercourse with such persons. He not only warns Timothy not to resemble them, but exhorts him to avoid them as dangerous plagues; for, although they do not openly resist the gospel, but, on the contrary, make a false profession of adhering to it, yet their society is infectious. Besides, if the multitude see that we are on familiar terms with those men, the danger is, lest they insinuate themselves under the guise of our friendship. ¹ We should therefore, labor to the utmost, that all may know, that so far are we from being agreed with them, that they have no communication with us. ²