1 Corinthians 8:2

And then he adds a third consideration, which was of force to set them down. What then is this? that although charity be joined with it, yet not even in that case is this our knowledge perfect. And therefore he adds, "But if any man think that he knoweth any thing, he knoweth nothing yet as he ought to know." This is a mortal blow. "I dwell not," saith he, "on the knowledge being common to all. I say not that by hating your neighbor and by arrogance, you injure yourself most. But even though you have it by yourself alone, though you be modest, though you love your brother, even in this case you are imperfect in regard of knowledge. For as yet thou knowest nothing as thou oughtest to know." Now if we possess as yet exact knowledge of nothing, how is it that some have rushed on to such a pitch of frenzy as to say that they know God with all exactness? Whereas, though we had an exact knowledge of all other things, not even so were it possible to possess this knowledge to such an extent. For how far He is apart from all things, it is impossible even to say. And mark how he pulls down their swelling pride: for he said not, "of the matters before us ye have not the proper knowledge," but, "about every thing." And he did not say, "ye," but, "no one whatever," be it Peter, be it Paul, be it any one else. For by this he both soothed them and carefully kept them under.

Here he says something more, namely, that even if knowledge is united with love, it is still imperfect. For no one, be it Peter or Paul, knows anything as it ought to be known. Why then are you puffed up, you who have knowledge without …

Gratuitous knowledge teaches to know and the manner of knowing. Whence, upon that saying of the Apostle: "If any man think that he knoweth anything, he hath not yet known how he ought to know": Bernard says: "You see that the Apostle does not approve …

If any man think he knoweth any thing - Aright, unless so far he is taught by God. He knoweth nothing yet as he ought to know - Seeing there is no true knowledge without divine love.

And if any man think that he knows anything,....

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.

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 (1Co 8:1) means. as he ought to know--experimentally and in the way of "love."

And if any think ... - The connection and the scope of this passage require us to understand this as designed to condemn that vain conceit of knowledge, or self-confidence, which would lead us to despise others, or to disregard their interests. “If anyone is conceited of his knowledge, is so vain, and proud, and self-confident, that he is led to despise others, and to disregard their true interests, he has not yet learned the very first elements of true knowledge as he ought to learn them, True knowledge will make us humble, modest, and kind to others. It will not puff us up, and it will not lead us to overlook the real happiness of others.” See Rom 11:25. Any thing - Any matter pertaining to science, morals, philosophy, or religion. This is a general maxim pertaining to all pretenders to knowledge. He knoweth nothing yet ... - He has not known what is most necessary to be known on the subject; nor has he known the true use and design of knowledge, which is to edify and promote the happiness of others. If a man has not so learned anything as to make it contribute to the happiness of others, it is a proof that he has never learned the true design of the first elements of knowledge. Paul’s design is to induce them to seek the welfare of their brethren. Knowledge, rightly applied, will promote the happiness of all. And it is true now as it was then, that if a man is a miser in knowledge as in wealth; if he lives to accumulate, never to impart; if he is filled with a vain conceit of his wisdom, and seeks not to benefit others by enlightening their ignorance, and guiding them in the way of truth, he has never learned the true use of science, any more than the man has of wealth who always hoards, never gives. […]