The apostle comes here to the case of things that had been offered to idols, concerning which some of them sought satisfaction: a case that frequently occurred in that age of Christianity, when the church of Christ was among the heathen, and the Israel of God must live among the Canaanites. For the better understanding of it, it must be observed that it was a custom among the heathens to make feasts on their sacrifices, and not only to eat themselves, but invite their friends to partake with them. These were usually kept in the temple, where the sacrifice was offered (Co1 8:10), and, if any thing was left when the feast ended, it was usual to carry away a portion to their friends; what remained, after all, belonged to the priests, who sometimes sold it in the markets. See Co1 10:25. Nay, feasts, as Athenaeus informs us, were always accounted, among the heathen, sacred and religious things, so that they were wont to sacrifice before all their feasts; and it was accounted a very profane thing among them, athuta esthiein, to eat at their private tables any meat whereof they had not first sacrificed on such occasions. In this circumstance of things, while Christians lived among idolaters, had many relations and friends that were such, with whom they must keep up acquaintance and maintain good neighbourhood, and therefore have occasion to eat at their tables, what should they do if any thing that had been sacrificed should be set before them? What, if they should be invited to feast with them in their temples? It seems as if some of the Corinthians had imbibed an opinion that even this might be done, because they knew an idol was nothing in the world, Co1 8:4. The apostle seems to answer more directly to the case (ch. 10), and here to argue, upon supposition of their being right in this thought, against their abuse of their liberty to the prejudice of others; but he plainly condemns such liberty in ch. 10. The apostle introduces his discourse with some remarks about knowledge that seem to carry in them a censure of such pretences to knowledge as I have mentioned: We know, says the apostle, that we all have knowledge (Co1 8:1); as if he had said, "You who take such liberty are not the only knowing persons; we who abstain know as much as you of the vanity of idols, and that they are nothing; but we know too that the liberty you take is very culpable, and that even lawful liberty must be used with charity and not to the prejudice of weaker brethren." Knowledge puffeth up, but charity edifieth, Co1 8:1. Note, 1. The preference of charity to conceited knowledge. That is best which is fitted to do the greatest good. Knowledge, or at least a high conceit of it, is very apt to swell the mind, to fill it with wind, and so puff it up. This tends to no good to ourselves, but in many instances is much to the hurt of others. But true love, and tender regard to our brethren, will put us upon consulting their interest, and acting as may be for their edification. Observe, 2. That there is no evidence of ignorance more common than a conceit of knowledge: If any man think that he knoweth any thing, he knoweth nothing yet as he ought to know. He that knows most best understands his own ignorance, and the imperfection of human knowledge. He that imagines himself a knowing man, and is vain and conceited on this imagination, has reason to suspect that he knows nothing aright, nothing as he ought to know it. Note, It is one thing to know truth, and another to know it as we ought, so as duly to improve our knowledge. Much may be known when nothing is known to any good purpose, when neither ourselves nor others are the better for our knowledge. And those who think they know any thing, and grow fain hereupon, are of all men most likely to make no good use of their knowledge; neither themselves nor others are likely to be benefited by it. But, adds the apostle, if any man love God, the same is known of God. If any man love God, and is thereby influenced to love his neighbour, the same is known of God; that is, as some understand it, is made by him to know, is taught of God. Note, Those that love God are most likely to be taught of God, and be made by him to know as they ought. Some understand it thus: He shall be approved of God; he will accept him and have pleasure in him. Note, The charitable person is most likely to have God's favour. Those who love God, and for his sake love their brethren and seek their welfare, are likely to be beloved of God; and how much better is it to be approved of God than to have a vain opinion of ourselves!

He knoweth nothing yet, etc. - The person who acts in this rash, unfeeling way, from the general knowledge which he has of the vanity of idolatry and the liberty which the Gospel affords from Jewish rites, with all his knowledge does not know this, that though the first and greatest commandment says, Thou shalt love the Lord thy God with all thy heart, etc., yet the second is like unto it: Thou shalt love thy neighbor as thyself. He, then, that can torment his neighbour's weak or tender conscience with his food or his conduct, does not love him as himself, and therefore knows nothing as he ought to know.

And if any man think that he knows anything,.... Whoever has an opinion of himself, or is conceited with his own knowledge, and fancies that he knows more than he does; which is always the case of those that are elated with their knowledge, and treat others with contempt, and have no regard to their peace and edification:

he knoweth nothing yet as he ought to know; if he did, he would know this, that he ought to consult the peace, comfort, and edification of his brother; and therefore whatever knowledge he may fancy he has attained to, or whatever he may be capable of, and hereafter obtain, for the present he must be put down for a man that knows nothing as he should do; for he knows neither his duty to God nor man; if he knew the former, he would know the latter.

And--omitted in the oldest manuscripts The absence of the connecting particle gives an emphatical sententiousness to the style, suitable to the subject. The first step to knowledge is to know our own ignorance. Without love there is only the appearance of knowledge.

knoweth--The oldest manuscripts read a Greek word implying personal experimental acquaintance, not merely knowledge of a fact, which the Greek of "we know" or are aware (Co1 8:1) means.

as he ought to know--experimentally and in the way of "love."