So let no one boast of men. For all things are yours,
ὥστε μηδεὶς καυχάσθω ἐν ἀνθρώποις· πάντα γὰρ ὑμῶν ἐστιν,
Wherefore let no man glory in men; for all things are yours. He comes again to the former topic, pointing out that not even for their spiritual things ought they to be highminded, as having nothing of themselves. Since then the wisdom from without is hurtful, and the spiritual gifts were not given by you, what have you wherein to boast? And in regard to the wisdom from without, Let no man deceive himself, says he, because they were conceited about a thing which in truth did more harm than good. But here, inasmuch as the thing spoken of was really advantageous, Let no man glory. And he orders his speech more gently: for all things are yours.
Haydock Catholic Bible Commentary: 1 Corinthians
Let no man deceive himself. He next precautions them against themselves, and admonishes them to be upon their guard against curiosity, presumption, and self-love, and tells them to undervalue all other sciences, when put in competition with the science of salvation, the knowledge of the gospel. It hence appears, that some of the Corinthians were renowned for that human eloquence which the world so much esteems, and accordingly the apostle discovers to them the danger to which they are exposing themselves, by pursuing their present line of conduct. Calmet. — If any man among you seem to be wise in this world. He hints at some new teachers among them, (not at Apollo) who to gain the esteem of men, had introduced errors from profane philosophy, or the false principles of human wisdom, which, as he had told them before, was folly in the sight of God. He therefore tells such persons, that to become truly wise, they must become fools, by returning to the simplicity of the gospel-doctrine. Wi. — Let no man. That is, let no man say, I am for Paul, I am for Apollo. This language will introduce into the Church of God those various sects that existed amongst the philosophers, who were distinguished by the title of Platonics, Stoics, Peripatetic, and so on. Grotius.