1 Corinthians 3:18 - Matthew Poole's English Annotations on the Holy Bible

Let not man deceive himself: there are some that, with their eloquence and flourishes of words, or with their philosophical notions and reasonings, \which, Colossians 2:8, the apostle calls vain deceit\ or with their traditions after the rudiments of the world, (as the apostle addeth in that place), would cheat and deceive your souls, under a pretence of making you wonderfully wise: the wisdom of the world is foolishness with God. If any man among you seemeth to be wise in this world; if any of you seemeth unto others, or seemeth unto himself, that is, thinketh that he is endued with what the world calleth wisdom. Let him become a fool, that he may be wise; if ever he would be truly wise, wise unto God, and to eternal life and salvation, let him be contented, by the wise men and philosophers of this world, to be looked upon as a fool; and let him be willing to deny himself in any notions or opinions of his own, which he hath taken up upon the credit of his natural reason and philosophical principles, which agree not with the Divine revelation, that so he may be truly and spiritually wise, truly understanding, savouring, and believing what God hath in his word revealed, and is alone able to make the man of God wise to salvation, thoroughly furnished unto every good work.