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 logomachias (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.

He is proud - That is, he is lifted up with his fancied superior acquaintance with the nature of religion. The Greek verb means, properly, "to smoke, to fume;" and then to be inflated, to "be conceited, etc." The idea is, that he has no proper knowledge of the nature of the gospel, and yet he values himself on a fancied superior acquaintance with its principles.
Knowing nothing - Margin, "a fool." That is, that he does not understand the nature of religion as he supposes he does. His views in regard to the relation of masters and servants, and to the bearing of religion on that relation, show that he does not understand the genius of Christianity. The apostle expresses this in strong language; by saying that he knows nothing; see the notes on 1-Corinthians 8:2.
But doting - Margin, "sick." The Greek word - νοσέω noseō - means properly to be sick; then to languish, to pine after. The meaning here is, that such persons had a sickly or morbid desire for debates of this kind. They had not a sound and healthy state of mind on the subject of religion. They were like a sickly man, who has no desire for solid and healthful food, but for that which will gratify a diseased appetite. They desired not sound doctrine, but controversies about unimportant and unsubstantial matters - things that bore the same relation to important doctrines which the things that a sick man pines after do to substantial food.
Questions and strifes of words - The Jews abounded much in disputes of this sort, and it would seem probable that the persons here referred to were Jewish teachers; compare 1-Timothy 1:6-7 notes, and Acts 18:15 note.
Whereof cometh envy - The only fruit of which is to produce envy. That is, the appearance of superior knowledge; the boast of being profoundly acquainted with religion, and the show of an ability for subtle argumentation, would produce in a certain class envy. Envy is uneasiness, pain, mortification, or discontent, excited by another's prosperity, or by his superior knowledge or possessions; see the notes on Romans 1:29.
Strife - Or contentions with those who will not readily yield to their opinions.
Railings - Harsh and abusive language toward those who will not concede a point - a common effect of disputes, and more commonly of disputes about small and unimportant matters, than of these which are of magnitude. Such railings often attend disputes that arise out of nice and subtle distinctions.
Evil surmisings - Suspicions that they are led to hold their views, not by the love of the truth, but from sordid or worldly motives. Such suspicions are very apt to attend an angry debate of any kind. It might be expected especially to exist on such a question as the apostle refers to here - the relation of a master and a slave. It is always very hard to do justice to the motives of one who seems to us to be living in sin, or to believe it to be possible that he acts from right motives.

He is proud - Τετυφωται· He is blown up, or inflated with a vain opinion of his own knowledge; whereas his knowledge is foolishness, for he knows nothing.
Doting about questions - He is sick, distempered, about these questions relative to the Mosaic law and the traditions of the elders; for it is most evident that the apostle has the Judaizing teachers in view, who were ever, in questions of theology, straining out a gnat, and swallowing a camel.
Strifes of words - Λογομαχιας· Logomachies; verbal contentions; splitting hairs; producing Hillel against Shammai, and Shammai against Hillel, relative to the particular mode in which the punctilios of some rites should be performed. In this sort of sublime nonsense the works of the Jewish rabbins abound.
Whereof cometh envy, strife, etc. - How little good have religious disputes ever done to mankind, or to the cause of truth! Most controversialists have succeeded in getting their own tempers soured, and in irritating their opponents. Indeed, truth seems rarely to be the object of their pursuit; they labor to accredit their own party by abusing and defaming others; from generals they often descend to particulars; and then personal abuse is the order of the day. Is it not strange that Christians either cannot or will not see this? Cannot any man support his own opinions, and give his own views of the religion of Christ, without abusing and calumniating his neighbor? I know not whether such controversialists should not be deemed disturbers of the public peace, and come under the notice of the civil magistrate. Should not all Christians know that the wrath of man worketh not the righteousness of the Lord?

He is proud, knowing nothing, but doting about questions and (b) strifes of words, whereof cometh envy, strife, railings, evil surmisings,
(b) Strivings about words, and not about matter: and by words he means all those things which do not have substance in them, and by which we can reap no profit.

He is proud,.... Or swelled and puffed up with a vain conceit of himself and his own notions, and treats with an haughty air the faithful ministers of the word. The doctrines of grace are of an humbling nature, especially when they are spiritually and experimentally understood and received; but notional knowledge, knowledge of natural things, and the doctrines of men, such as are of their own invention, fill the mind with pride and vanity:
knowing nothing; as he ought to know; not anything that is solid and substantial; nothing of the Gospel of Jesus Christ: he may have knowledge of natural and civil things, but not of spiritual ones; he may have collected a medley of knowledge together, but what will be of no real use either to himself or others:
but doting about questions and strifes of words: or he is "sick or diseased"; his mind is distempered; he is like one in a fever, that is delirious; his head is light and wild; his fancy is roving, and he talks of things he knows not what; his head runs upon "questions"; foolish and unlearned ones, about the law and works, and the necessity of them to justification and salvation; concerning genealogies, and other fruitless and unprofitable subjects:
and strifes of words; mere logomachies; contending and quarrelling more about words than things, which tend to no profit, but to the subverting and confounding of hearers. The ill effects of which are as follow:
whereof cometh envy: at the superior gifts and talents of others; at their success, and any little degree of honour and respect they have from others; which shows that such men, in whom this vice is a governing one, are carnal men, for this is a work of the flesh; and that they are destitute of charity, or the grace of love, which envieth not: also from hence comes
strife; contention, quarrelling; the peace and comfort of particular persons, and even of whole communities, are broken and destroyed hereby; for foolish and unlearned questions gender strifes, 2-Timothy 2:24 which are very unbecoming the servants of the Lord, and very uncomfortable to the churches of Christ: yea, these also produce
railings; at one another, and especially at the faithful ministers of the Gospel; for when the false teachers cannot overcome them by Scripture and argument, they fall to railing and reviling of them: or entertain
evil surmises; groundless suspicions: or from hence follow, as the words may be rendered, "wicked opinions": concerning the being, perfections, purposes, and providence of God; concerning the person and offices of Christ; concerning the law and Gospel, grace and good works; and so the Syriac version renders it, "an evil opinion of the mind".

He is proud--literally, "wrapt in smoke"; filled with the fumes of self-conceit (1-Timothy 3:6) while "knowing nothing," namely, of the doctrine which is according to godliness (1-Timothy 6:3), though arrogating pre-eminent knowledge (1-Timothy 1:7).
doting about--literally, "sick about"; the opposite of "wholesome" (1-Timothy 6:3). Truth is not the center about which his investigations move, but mere word-strifes.
questions--of controversy.
strifes of words--rather than about realities (2-Timothy 2:14). These stand with them instead of "godliness" and "wholesome words" (1-Timothy 6:3; 1-Timothy 1:4; Titus 3:9).
evil surmisings--as to those who are of a different party from themselves.

He is puffed up - Which is the cause of his not consenting to the doctrine which is after inward, practical religion. By this mark we may know them. Knowing nothing - As he ought to know. Sick of questions - Doatinglyy fond of dispute; an evil, but common, disease; especially where practice is forgotten. Such, indeed, contend earnestly for singular phrases, and favourite points of their own. Everything else, however, like the preaching of Christ and his apostles, is all "law," and "bondage," and "carnal reasoning." Strifes of words - Merely verbal controversies. Whereof cometh envy - Of the gifts and success of others. Contention - For the pre - eminence. Such disputants seldom like the prosperity of others, or to be less esteemed themselves. Evil surmisings - It not being their way to think well of those that differ from themselves in opinion.