1 Corinthians 2:13

There is then in philosophy, though stolen as the fire by Prometheus, a slender spark, capable of being fanned into flame, a trace of wisdom and an impulse from God. ...Aristotle, too, assented to Scripture, and declared sophistry to have stolen wisdom, as we intimated before. And the apostle says, "Which things we speak, not in the words which man's wisdom teacheth, but which the Holy Ghost teacheth." For of the prophets it is said, "We have all received of His fulness," that is, of Christ's. So that the prophets are not thieves.

This does not mean that Paul did not have any human wisdom but that he preached in the wisdom of the Spirit.

But what is this, "comparing spiritual things with spiritual?" When a thing is spiritual and of dubious meaning, we adduce testimonies from the things which are spiritual. For instance, I say, Christ rose again-was born of a Virgin; I adduce testimonies and types and demonstrations; the abode of Jonah in the whale and his deliverance afterwards; the child-bearing of the barren, Sarah, Rebecca, and the rest; the springing up of the trees which took place in paradise when there had been no seeds sown, no rains sent down, no furrow drawn along. For the things to come were fashioned out and figured forth, as in shadow, by the former things, that these which are now might be believed when they came in. And again we shew, how of the earth was man, and how of man alone the woman; and this without any intercourse whatever; how the earth itself of nothing, the power of the Great Artificer being every where sufficient for all things. Thus "with spiritual things" do I "compare spiritual," and in no instance have I need of the Wisdom which is without-neither its reasonings nor its embellishments. For such persons do but agitate the weak understanding and confuse it; and are not able to demonstrate clearly any one of the things which they affirm, but even have the contrary effect. They rather disturb the mind and fill it with darkness and much perplexity. Wherefore he saith, "with spiritual things comparing spiritual." Seest thou how superfluous he sheweth it to be? and not only superfluous, but even hostile and injurious: for this is meant by the expressions, "lest the Cross of Christ be made of none effect," and, "that our faith should not stand in the wisdom of men." And he points out here, that it is impossible for those who confidently entrust every thing to it, to learn any useful thing.

We, he says, have all the more wisdom in comparison with the Greek sages, in that they were instructed by men, whereas we speak by the inspiration of the Holy Spirit. That is, if any spiritual questions arise, we judge them, that is, we resolve …

Above the Apostle had said: "We speak wisdom among the perfect." Therefore, after indicating that it is a mark of this wisdom not to be known by worldly men, but to be known by the saints, he now discloses the way in which the saints …