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!

As touching things offered unto idols - This was another subject on which the Corinthians had asked the apostle's advice, and we shall understand the whole of this chapter the better when we consider one fact, viz. That there had long subsisted a controversy between the Karaites and the Traditionists, how far it was lawful to derive any benefit or advantage from things used by the Gentiles. The Karaites were a sect of the Jews who scrupulously held to the letter of the sacred writings, taking this alone for their directory. The Traditionists were those who followed the voice of the elders, interpreting the Divine testimonies by their decisions. From a work of the Karaites, entitled Addereth Eliyahu, Triglandus has extracted the following decisions, which will throw light upon this subject. "It is unlawful to receive any benefit from any kind of heathen worship, or from any thing that has been offered to an idol." - "It is unlawful to buy or sell an idol, and if, by accident, any such thing shall come into thy power, thou shalt derive no emolument from it." - "The animals that are destined and prepared for the worship of idols are universally prohibited; and particularly those which bear the mark of the idol. This should be maintained against the opinion of the Traditionists, who think they may lawfully use these kinds of animals, provided they be not marked with the sign of the idol." Thus far the Karaites; and here we see one strong point of difference between these two sects. The Karaites totally objected to every thing used in idolatrous services: the Traditionists, as the Talmud shows, did generally the same; but it appears that they scrupled not to use any animal employed in idolatrous worship, provided they did not see the sign of the idol on it. Now the sign of the idol must be that placed on the animal previously to its being sacrificed, such as gilded horns and hoofs, consecrated fillets, garlands, etc. And as, after it had been sacrificed, and its flesh exposed for sale in the shambles, it could bear none of these signs, we may take it for granted that the Jews might think it lawful to buy and eat this flesh: this the Karaite would most solemnly scruple. It may be just necessary to state here, that it was customary, after the blood and life of an animal had been offered in sacrifice to an idol, to sell the flesh in the market indiscriminately with that of other animals which had not been sacrificed, but merely killed for common use. Even the less scrupulous Jews, knowing that any particular flesh had been thus offered, would abhor the use of it; and as those who lived among the Gentiles, as the Jews at Corinth, must know that this was a common case, hence they would be generally scrupulous; and those of them that were converted to Christianity would have their scruples increased, and be as rigid on this point as the Karaites themselves. On the other hand, those of the Gentiles who had received the faith of Christ, knowing that an idol was nothing in the world, nor was even a representation of any thing, (for the beings represented by idol images were purely imaginary), made no scruple to buy and eat the flesh as they used to do, though not with the same intention; for when, in their heathen state, they ate the flesh offered to idols, they ate it as a feast with the idol, and were thus supposed to have communion with the idol; which was the grossest idolatry.

From these observations it will at once appear that much misunderstanding and offense must have existed in the Corinthian Church; the converted Jews abominating every thing that they knew had been used in the heathen worship, while the converted Gentiles, for the reasons above assigned, would feel no scruple on the account.

We know that we all have knowledge - I am inclined to think that these are not St. Paul's words, but a quotation from the letter of the Corinthians to him, and a proof of what the apostle says below, knowledge puffeth up; but however the words may be understood as to their origin, they contain a general truth, as they relate to Christians of those times, and may be thus paraphrased; "All we who are converted to God by Christ have sufficient knowledge concerning idols and idol worship; and we know also the liberty which we have through the Gospel, not being bound by Jewish laws, rites, ceremonies, etc.; but many carry their knowledge in this liberty too far, and do what is neither seemly nor convenient, and thus give offense to others."

Knowledge puffeth up, but charity edifieth - This knowledge is very nearly allied to pride; it puffeth up the mind with vain conceit, makes those who have it bold and rash, and renders them careless of the consciences of others. And this knowledge, boasted of by the Corinthians, led them to contemn others; for so the word φυσιοι is understood by some eminent critics.

Now as touching things offered unto idols,.... This was another of the things the Corinthians wrote to the apostle about, desiring to have his judgment in; it was a controversy that had been before moved, whether it was lawful to eat things that had been sacrificed to idols. This was considered in the council at Jerusalem, Act 15:28 and it was agreed to, for the peace of the churches, that the Gentiles, among other things, be advised to abstain from them; which, it seems, the church at Corinth knew nothing of, for the controversy was now moved among them: some that were weak in the faith, and had not, at least, clear notions of Gospel liberty, thought it very criminal and sinful to eat them; others that had, or boasted they had, more knowledge, would not only eat them privately at home, having bought them of the Heathen priests, or in the common meat markets, where they were exposed to sale, and at public feasts, to which they were invited by their friends; but would even go into an idol's temple, and sit and eat them there, to the great grief and prejudice of weak Christians; and what they had to plead in their own defence was their knowledge, to which the apostle here replies:

we know that we all have knowledge; said either affirmatively and seriously; and the meaning is, that the apostles and other Christians knew, and were conscious to themselves of their light and knowledge, and were assured, and might affirm with confidence, that they all, or the most part, only some few excepted, see Co1 8:7 had the same knowledge of Christian liberty as they had; knew that an idol was nothing, and that eating meats offered to them could not defile, or do them any hurt; for they were very sensible there was nothing common or unclean of itself, and yet did not think fit to make use of their knowledge to the grieving and wounding of their fellow Christians: or else this is said ironically, we are wise folks; you particularly are men of knowledge, and wisdom will die with you; you know that you know; you are very knowing in your own conceits, and very positive as to your knowledge. It was the saying of Socrates, that that this one thing he knew, that he knew nothing; but men wise in their own opinions know everything:

knowledge puffeth up; not true knowledge; not that which comes from above, which is gentle and easy to be entreated; not sanctified knowledge, or that which has the grace of God going along with it; that makes men humble, and will not suffer them to be puffed up one against another; but a mere show of knowledge, knowledge in conceit, mere notional and speculative knowledge, that which is destitute of charity or love:

but charity edifieth; that is, a man that has knowledge, joined with love to God, and his fellow Christians, will seek for that which makes for the edification of others; and without this all his knowledge will be of no avail, and he himself be nothing.