Here he prescribes humility, and a modest opinion of themselves, for the remedy of the irregularities in the church of Corinth, the divisions and contests among them: "Let no man deceive himself, Co1 3:18. Do not be led away from the truth and simplicity of the gospel by pretenders to science and eloquence, by a show of deep learning, or a flourish of words, by rabbis, orators, or philosophers." Note, We are in great danger of deceiving ourselves when we have too high an opinion of human wisdom and arts; plain and pure Christianity will be likely to be despised by those who can suit their doctrines to the corrupt taste of their hearers, and set them off with fine language, or support them with a show of deep and strong reasoning. But he who seems to be wise must become a fool that he may be wise. He must be sensible of his own ignorance, and lament it; he must distrust his own understanding, and not lean on it. To have a high opinion of our wisdom is but to flatter ourselves, and self-flattery is the very next step to self-deceit. The way to true wisdom is to sink our opinion of our own to a due level, and be willing to be taught of God. He must become a fool who would be truly and thoroughly wise. The person who resigns his own understanding, that he may follow the instruction of God, is in the way to true and everlasting wisdom. The meek will he guide in judgment, the meek will he teach his way, Psa 25:9. He that has a low opinion of his own knowledge and powers will submit to better information; such a person may be informed and improved by revelation: but the proud man, conceited of his own wisdom and understanding, will undertake to correct even divine wisdom itself, and prefer his own shallow reasonings to the revelations of infallible truth and wisdom. Note, We must abase ourselves before God if we would be either truly wise or good: For the wisdom of this world is foolishness with God, Co1 3:19. The wisdom which worldly men esteem (policy, philosophy, oratory) is foolishness with God. It is so in a way of comparison with his wisdom. He chargeth his angels with folly (Job 4:18), and much more the wisest among the children of men. His understanding is infinite, Psa 147:5. There can be no more comparison between his wisdom and ours than between his power and being and ours. There is no common measure by which to compare finite and infinite. And much more is the wisdom of man foolishness with God when set in competition with his. How justly does he despise, how easily can he baffle and confound it! He taketh the wise in their own craftiness (Job 5:13), he catches them in their own nets, and entangles them in their own snares: he turns their most studies, plausible, and promising schemes against themselves, and ruins them by their own contrivance. Nay, He knows the thoughts of the wise, that they are vain (Co1 3:20), that they are vanity, Psa 94:11. Note, God has a perfect knowledge of the thoughts of men, the deepest thoughts of the wisest men, their most secret counsels and purposes: nothing is hidden from him, but all things are naked and bare before him, Heb 4:13. And he knows them to be vanity. The thoughts of the wisest men in the world have a great mixture of vanity, of weakness and folly, in them; and before God their wisest and best thoughts are very vanity, compared, I mean, with his thoughts of things. And should not all this teach us modesty, diffidence in ourselves, and a deference to the wisdom of God, make us thankful for his revelations, and willing to be taught of God, and not be led away by specious pretences to human wisdom and skill, from the simplicity of Christ, or a regard to his heavenly doctrine? Note, He who would be wise indeed must learn of God, and not set his own wisdom up in competition with God's.

The Lord knoweth the thoughts of the wise - They are always full of schemes and plans for earthly good; and God knows that all this is vain, empty, and unsatisfactory; and will stand them in no stead when he comes to take away their souls. This is a quotation from Psa 94:11. What is here said of the vanity of human knowledge is true of every kind of wisdom that leads not immediately to God himself.

And again,.... Not in the same place, nor in the same book, but in the Psalms, in Psa 94:11. This form of citing Scriptures answers to and moreover, used by the Jewish doctors when the matter does not so clearly appear from the first proof, and therefore they produce another (q): and so here the apostle, for the further confirmation and illustration of this point, that the wisdom of this world is foolishness with God, to the testimony of Eliphaz, adds this of David,

the Lord knoweth the thoughts of the wise, that they are vain; in the Psalms it is, "the Lord knoweth the thoughts of men, that they are vanity"; which the apostle not only cites, but explains and teaches; as that by men is meant men of wisdom and knowledge, of the greatest capacities, whose thoughts, reasonings, schemes, and devices, the omniscient God not only knows, but makes known, and discovers them, sooner or later, to be vain and fruitless, yea, vanity itself; and notwithstanding all their machinations and contrivances, his counsel shall stand, his Gospel shall be maintained, his truths shall prevail, and his ordinances shall be continued, and his work go on.

(q) Vid. Surenhusii Biblos Katallages, p. 11, 531.

Quotation from Psa 94:11. There it is of men; here it is "of the wise." Paul by inspiration states the class of men whose "thoughts" (or rather, "reasonings," as suits the Greek and the sense of the context) the Spirit designated in the Psalm, "vanity," namely, the "proud" (Psa 94:2) and worldly-wise, whom God in Psa 94:8 calls "fools," though they "boast themselves" of their wisdom in pushing their interests (Psa 94:4).