For both the Jews require signs, and the Greeks seek after wisdom:

“As, then, he who is fond of hunting captures the game after seeking, tracking, scenting, hunting it down with dogs; so truth, when sought and got with toil, appears a delicious thing. Why, then, you will ask, did you think it fit that such an arrangement should be adopted in your memoranda? Because there is great danger in divulging the secret of the true philosophy to those, whose delight it is unsparingly to speak against everything, not justly; and who shout forth all kinds of names and words indecorously, deceiving themselves and beguiling those who adhere to them. "For the Hebrews seek signs," as the apostle says, "and the Greeks seek after wisdom."”

“Since then the man, not the god, of the world in his wisdom knew not God, whom indeed he ought to have known (both the Jew by his knowledge of the Scriptures, and all the human race by their knowledge of God's works), therefore that God, who was not acknowledged in His wisdom, resolved to smite men's knowledge with His foolishness, by saving all those who believe in the folly of the preached cross. "Because the Jews require signs," who ought to have already made up their minds about God, "and the Greeks seek after wisdom," who rely upon their own wisdom, and not upon God's. If, however, it was a new god that was being preached, what sin had the Jews committed, in seeking after signs to believe; or the Greeks, when they hunted after a wisdom which they would prefer to accept? Thus the very retribution which overtook both Jews and Greeks proves that God is both a jealous God and a Judge, inasmuch as He infatuated the world's wisdom by an angry and a judicial retribution.”

“That He also is both the wisdom and the power of God, Paul proves in his first Epistle to the Corinthians. "Because the Jews require a sign, and the Creeks seek after wisdom: but we preach Christ crucified, to the Jews indeed a stumbling-block, and to the Gentiles foolishness; but to them that are called, both Jews and Greeks, Christ the power of God and the wisdom of God."”

“Next, to shew the power of the Cross, he saith, "For Jews ask for signs and Greeks seek after wisdom: but we preach Christ crucified, unto Jews a stumbling-block, and unto Greeks foolishness; but unto them that are called, both Jews and Greeks, Christ the Power of God, and the Wisdom of God." Vast is the import of the things here spoken! For he means to say how by contraries God hath overcome, and how the Gospel is not of man. What he saith is something of this sort. When, saith he, we say unto the Jews, Believe; they answer, Raise the dead, Heal the demoniacs, Shew unto us signs. But instead thereof what say we? That He was crucified, and died, who is preached. And this is enough, not only to fail in drawing over the unwilling, but even to drive away those even who are willing. Nevertheless, it drives not away, but attracts and holds fast and overcomes. Again; the Greeks demand of us a rhetorical style, and the acuteness of sophistry. But preach we to these also the Cross, and that which in the case of the Jews seems weakness, this in the case of the Greeks is foolishness. Wherefore, when we not only fail in producing what they demand, but also produce the very opposites of their demand; (for the Cross has not merely no appearance of being a sign sought out by reasoning, but even the very annihilation of a sign;-is not merely deemed no proof of power, but a conviction of weakness;-not merely no display of wisdom, but a suggestion of foolishness;)-when therefore they who seek for signs and wisdom not only receive not the things which they ask, but even hear the contrary to what they desire, and then by means of contraries are persuaded;-how is not the power of Him that is preached unspeakable? As if to some one tempest-tost and longing for a haven, you were to shew not a haven but another wilder portion of the sea, and so could make him follow with thankfulness? Or as if a physician could attract to himself the man that was wounded and in need of remedies, by promising to cure him not with drugs, but with burning of him again! For this is a result of great power indeed. So also the Apostles prevailed, not simply without a sign, but even by a thing which seemed contrary to all the known signs. Which thing also Christ did in the case of the blind man. For when He would heal him, He took away the blindness by a thing that increased it: i.e. He put on clay. As then by means of clay He healed the blind man, so also by means of the Cross He brought the world to Himself. That certainly was adding an offence, not taking an offence away. So did He also in creation, working out things by their contraries. With sand, for instance, He walled in the sea, having made the weak a bridle to the strong. He placed the earth upon water, having taken order that the heavy and the dense should be borne on the soft and fluid. By means of the prophets again with a small piece of wood He raised up iron from the bottom. In like manner also with the Cross He hath drawn the world to Himself. For as the water beareth up the earth, so also the Cross beareth up the world. You see now, it is proof of great power and wisdom, to convince by means of the things which tell directly against us. Thus the Cross seems to be matter of offence; and yet far from offending, it even attracts.”

“After the apostle had condemned the Corinthians' contention, an argument taken from the side of Baptism, here he excludes their contention, an argument taken from the side of doctrine. For some of them were glorying in the teaching of the pseudo-apostles, who by ornamented words and reasonings of human wisdom were corrupting the truth of the faith. And therefore the apostle first shows that this manner is not suited to the doctrine of the faith; second he shows that he had not used this manner of teaching among them, in chapter II, where it says, and I, when I had come to, etc. Concerning the first he does two things. First he proposes what he intends; second he makes manifest his proposal, at that lest the cross of Christ be emptied. He says therefore first: I said that Christ sent me to evangelize, not however in such a way that I evangelize in wisdom of word, that is, in worldly wisdom, which makes men wordy, insofar as through it men make use of many vain reasonings. Ecclesiastes VI, 11: where there are many words, they have much vanity in disputing. Proverbs XIV, 23: where there are many words, there is often want. Or he names wisdom of word as rhetoric, which teaches to speak ornately, from which men are sometimes enticed to assent to errors and falsehoods. Whence Romans XVI, 18: by sweet words they seduce the hearts of the innocent. And of the harlot it is said in Proverbs II, 16, in figure of heretical doctrine: that you may be delivered from the strange and foreign woman, who softens her words. But against this it is said in Isaiah XXXIII, 19: you shall not see the shameless people, namely in the Catholic Church, and the people of lofty speech, so that you cannot understand the eloquence of his tongue, in which there is no wisdom. But because in the Greek is put logos, which signifies both reason and speech, it could more fittingly be understood as wisdom of word, that is, of human reason, because those things which are of faith exceed human reason, according to that of Ecclesiasticus III, 25: many things above the sense of man have been shown to you. But against this it seems to be that many teachers of the Church have used wisdom and human reasonings and ornament of words in the doctrine of faith. For Jerome says in the letter to the great orator of the city of Rome, that all the teachers of the faith filled their books with the ornament of philosophy's teachings and sciences, so that you would not know which you ought first to admire in them, the erudition of the age, or the knowledge of the Scriptures. And Augustine says in the fourth book on Christian doctrine: there are churchmen who have treated the divine eloquences not only wisely, but also sweetly. It must therefore be said that it is one thing to teach in wisdom of word, in whatever way it be understood, and another to use wisdom of word in teaching. He teaches in wisdom of word who takes wisdom of word as the principal root of his doctrine, in such a way, namely, that he approves only those things which contain wisdom of word, and rejects those things which do not have wisdom of word, and this is corruptive of the faith. But he uses wisdom of word who, having laid down the foundations of true faith, if he finds any true things in the teachings of the philosophers, takes them up into the service of the faith. Whence Augustine says in the second book on Christian doctrine, that if the philosophers have said things accommodated to our faith, these are not only not to be feared, but are to be claimed from them for our use, as from unjust possessors. And in the fourth book on Christian doctrine he says: since the faculty of eloquence is set in the middle, which avails to persuade either wicked or right things, to many, why should it not be procured by the zeal of good men, that it may serve the truth, if the wicked usurp it for the use of iniquity and error? Then, when he says lest the cross of Christ be emptied, he proves what he had said, and first indeed from the side of the matter, second from the side of those who themselves teach, at that for behold your calling, etc. Concerning the first he does three things. First he shows that the manner of teaching which is in wisdom of word is not fitting to the Christian faith; second he proves what he had presupposed, at that for the word of the cross; third he manifests the proof, at that since the Jews seek signs. Concerning the first it must be considered, that even in philosophical teachings the same manner is not fitting to every doctrine. Whence discourses are to be received according to the matter, as is said in the first book of the Ethics. Then indeed a manner of teaching is most of all incongruous to the matter, when by such a manner that which is principal in that matter is destroyed, as for instance if someone in intellectual matters should wish to use metaphorical demonstrations, which do not transcend imagined things, to which the one who understands ought not to be led, as Boethius shows in the book On the Trinity. Now the principal thing in the doctrine of the Christian faith is salvation brought about through the cross of Christ. Whence, in chapter II, 2, he says, I did not judge myself to know anything among you, except Jesus Christ, and him crucified. But whoever principally rests, in teaching, on wisdom of word, as far as in him lies, empties the cross of Christ. Therefore to teach in wisdom of word is not a manner fitting to the Christian faith. This therefore is what he says, lest the cross of Christ be emptied, that is, lest, if I should wish to preach in wisdom of word, the faith be deprived of the power of the cross of Christ. Galatians V, 11: then is the scandal of the cross made void. Psalm CXXXVI, v. 7: who say, lay it bare, even to the foundation therein. Then, when he says the word of the cross, etc., he proves that through the doctrine which is in wisdom of word, the cross of Christ is emptied. And concerning this he does two things: first he brings forward the proof; second he assigns the cause of what has been said, at that for it is written, etc. He says therefore first: I said this, that if the doctrine of the faith were set forth through wisdom of word, the cross of Christ would be emptied, for the word of the cross, that is, the Annunciation of the cross of Christ, is foolishness, that is, it appears to be something foolish, to them indeed that perish, that is, to unbelievers who think themselves wise according to the world, because the preaching of the cross of Christ contains something which according to human wisdom seems impossible, namely that God should die, that the Almighty should be subjected to the hands of violent men. It also contains certain things which seem contrary to the prudence of this world, as that someone should not flee confusions when he could, and other such things. And therefore Festus said to Paul as he was announcing such things, as is read in Acts XXVI, 24: you are mad, Paul, much learning brings you to madness. And Paul himself says below, IV, 10: we are fools for Christ. And lest it be believed that the word of the cross truly contains foolishness, he adds, but to them who are saved, that is, to us, namely to Christ's faithful who are saved by him, according to that of Matthew chapter I, 21: for he shall save his people from their sins, it is the power of God, because in the cross of Christ they themselves recognize the death of God, by which he conquered the Devil and the world. Apocalypse V, 5: behold, the lion of the tribe of Judah has conquered. Likewise the power which they experience in themselves, while together with Christ they die to vices and concupiscences, according to that of Galatians V, 24: they who are Christ's have crucified their flesh with the vices and concupiscences. Whence in Psalm CIX, 2 it is said, the Lord shall send forth the rod of your power out of Sion. Luke VI, 19: power went out from him and healed all. Then when he says for it is written, he shows the cause of the aforesaid things, and he sets down first why the word of the cross is foolishness to men; second he shows why this foolishness is the power of God to those who are saved, at that for since in the wisdom of God, etc. Concerning the first he does two things. First he brings forward the authority foretelling what is sought; second he shows this to have been fulfilled, at that where is the wise? Concerning the first it must be considered that that which is in itself good cannot seem foolish to anyone, except on account of a defect of wisdom. This therefore is the cause why the word of the cross, which is salvation-bringing to believers, seems to some foolishness, because they themselves are deprived of wisdom. And this is what he says, for it is written: I will destroy the wisdom of the wise, and the prudence of the prudent I will reject. Now this can be taken from two places. For in Abdias it is said: I will destroy wisdom out of Idumea, and prudence out of the mount of Esau. But it is had more expressly in Isaiah XXIX, v. 14: the wisdom of the wise shall perish, and the understanding of their prudent men shall be hidden. Now wisdom and prudence differ. For wisdom is the knowledge of divine things; whence it pertains to contemplation, Job XXVIII, v. 28: the fear of the Lord, that is wisdom; but prudence properly is the knowledge of human things, whence it is said in Proverbs X, 23: wisdom is prudence to a man, because, namely, the knowledge of human things is called prudence. Whence also the Philosopher in the sixth book of the Ethics says that prudence is right reason of things to be done, and thus prudence pertains to reason. Now it must be considered that men, however evil, are not totally deprived of the gifts of God, nor in them are the gifts of God rejected, but in them is rejected and lost what proceeds from their own malice. And therefore he does not say simply, I will destroy wisdom, because all wisdom is from the Lord God, as is said in Isaiah XXIX, 14 and following, but I will destroy the wisdom of the wise, that is, which the wise of this world have devised for themselves against the true wisdom of God, because, as is said in James III, 15, this wisdom is not one descending from above, but earthly, animal, devilish. Likewise he does not say, I will reject prudence, for true prudence the wisdom of God teaches, but he says the prudence of the prudent, that is, which those who esteem themselves prudent in worldly matters reckon as prudence, namely that they should cling to the goods of this world. Or because, as is said in Romans VIII, v. 6, the prudence of the flesh is death. And thus, on account of a defect of wisdom, they reckon it impossible for God to become man, to suffer death according to human nature; but on account of a defect of prudence they reckon it unfitting that a man should endure the cross, despising the shame, as is said in Hebrews XII, 2. Then when he says where is the wise, etc., he shows that what had been proved concerning the rejection of human wisdom and prudence has been fulfilled. And first he sets down the middle term under a question; second he draws the conclusion, at that has not God made foolish the wisdom of this world, etc. He says therefore first, where is the wise? As if he were to say: he is not found in the congregation of the faithful who is saved. By the wise he understands the one who searches out the hidden causes of nature. Isaiah XIX, 11: how will you say to Pharaoh: I am the son of the wise? And this is referred to the Gentiles, who were devoted to the wisdom of this world. Where is the scribe? That is, one skilled in the law, and this is referred to the Jews; as if he were to say: he is not in the assembly of the faithful. John VII, 48: has any one of the rulers believed in him? Where is the disputer of this age? Namely, he who through prudence seeks out what is fitting for human life in the affairs of this age; as if he should say: he is not found among the faithful, and this is referred to both, namely Jews and Gentiles. Baruch chapter III, 23: the sons of Agar, who sought out the prudence that is of the earth. Now the apostle seems to take this question from what is said in Isaiah XXXIII, v. 18: where is the learned? In place of which he puts the wise. Where is he that weighs the words of the law? In place of which he puts the scribe. Where is the teacher of little ones? In place of which he puts the disputer of this age, because little ones are especially wont to be instructed concerning those things which pertain to the discipline of the moral life. Then when he says has not God made foolish, etc., he draws the conclusion under a question, as if he should say: since those who are reckoned wise of the world have failed from the way of salvation, has not God made foolish the wisdom of this world? That is, he has shown it to be foolish, since those who excelled in this wisdom were found so foolish that they did not receive the way of salvation. Jeremiah X, 14 and LI, 17: every man has become foolish by his own knowledge. Isaiah XLVII, 10: your wisdom and your knowledge, this has deceived you. But it can also be understood otherwise, what has been said, as if he should say: I will destroy the wisdom of the wise and the prudence of the prudent I will reject, that is, I will choose it in my first preachers, according to that of Proverbs XXX, 1: the vision which the man spoke with whom God is; and below: I am the most foolish of men, and the wisdom of men is not with me. Where is the wise? As if he should say: he is not found among the preachers of the faith. Matthew XI, 25: you have hidden these things from the wise and prudent, and have revealed them to little ones. Has not God made foolish, that is, shown to be foolish, the wisdom of this world? By doing what was reckoned impossible to them, namely that a dead man should rise, and other such things. Then when he says for since in the wisdom of God, etc., he assigns the reason why the faithful are saved through the foolishness of preaching. And this is what was said, that the word of the cross is indeed foolishness to them that perish, but the power of salvation to believers; for it pleased God through the foolishness of preaching, that is, through the preaching which human wisdom reckons foolish, to save those who believe; and this because the world, that is, worldly men, did not know God through wisdom taken from the things of the world, and this in the wisdom of God. For divine wisdom, making the world, instructs its judgments in the things of the world, according to that of Ecclesiasticus I, 10: he poured her out upon all his works; so that the creatures themselves, made through the wisdom of God, stand to the wisdom of God, whose judgments they bear, as the words of a man stand to his wisdom which they signify. And just as the disciple comes to know the master's wisdom through the words which he hears from him, so man was able to come to know the wisdom of God through beholding the creatures made by him, according to that of Romans chapter I, 20: the invisible things of God are clearly seen, being understood by the things that are made. But man, on account of the vanity of his heart, deviated from the rectitude of divine knowledge. Whence it is said in John I, 10: he was in the world, and the world was made by him, and the world knew him not. And therefore God led the faithful, through certain other things, to a saving knowledge of himself, which are not found in the very natures of creatures, on account of which they are reckoned foolish by worldly men, who consider only the reasons of human things. And such are the teachings of the faith. And it is similar, as if some master, seeing that his meaning is not received by his hearers through the words which he has uttered, strives to use other words, through which he can manifest what he has in his heart. Then when he says since also the Jews, etc., he manifests the proof of the things premised, and first as to what he had said: the word of the cross is foolishness to them that perish. Second as to what he had said: to them who are saved, it is the power of God — but to them who are called, etc. Concerning the first he does two things. First he sets down the differing zeal and intention of those who perish; second from this he assigns the reason for what he had said, at that but we preach Christ. Now of those who perish, that is, the unbelievers, some were Jews, some Gentiles. He says therefore: it was said that the word of the cross is foolishness to them that perish, and this because the Jews seek signs. For the Jews were accustomed to be instructed by divine means, according to that of Deuteronomy chapter VIII, 5: he taught him and instructed him. Which teaching indeed, since it had been manifested by God through many wonders, according to that of Psalm LXXVII, 12: he did wonders in the land of Egypt, and therefore they sought signs from those bringing any teaching whatsoever, according to that of Matthew chapter XII, 38: master, we would see a sign from you. And in Psalm LXXIII, 9 it is said: we have not seen our signs. But the Greeks seek wisdom, as being exercised in the pursuit of wisdom — I mean the wisdom which is received through the reasonings of worldly things, of which it is said in Jeremiah IX, 23: let not the wise man glory in his wisdom. By the Greeks he gives to understand all the Gentiles, who received worldly wisdom from the Greeks. They sought therefore wisdom, wishing to judge every doctrine proposed to them according to the rule of human wisdom. Then he concludes why the word of the cross is to them foolishness, saying, but we preach Christ crucified, according to that below in chapter XI, 26: you shall show forth the death of the Lord until he come. To the Jews indeed a scandal, because indeed they were desiring a power that works miracles, and they saw an infirmity suffering the cross; for, as it is said in II Corinthians, last chapter: he was crucified from weakness. But to the Gentiles foolishness, because it seems contrary to the reason of human wisdom that God should die and that a just and wise man should voluntarily expose himself to the most shameful death. Then, when he says but to them who are called, he manifests what he had said: but to them who are saved, it is the power of God. And first he manifests this; second he assigns the reason, at that because that which is foolish, etc. He says therefore first: it was said that we preach Christ crucified, to the Jews a scandal and to the Gentiles foolishness, but we preach Christ the power of God and the wisdom of God to them who are called, both Jews and Greeks, that is, to those who from among the Jews and the Gentiles have been called to the faith of Christ, who in the cross of Christ recognize the power of God, through which both the devils are overcome and sins are forgiven and men are saved. Psalm XX, 14: be exalted, O Lord, in your own power. And this he says against the scandal of the Jews, who were scandalized at the infirmity of Christ, and they recognize in the cross the wisdom of God, insofar as through the cross he frees the human race in the most fitting manner. Wisdom IX, 19: by wisdom they were healed, whosoever have pleased you from the beginning. Now he is called the power of God and the wisdom of God by a certain appropriation. Power indeed, insofar as through him the Father works all things, John I, 3: all things were made through him; but wisdom, insofar as the Word itself, which is the Son, is nothing other than wisdom begotten or conceived. Ecclesiasticus chapter XXIV, 5: I came out of the mouth of the most High, the firstborn before all creatures. But it is not to be understood in this way, that God the Father is strong and wise by a begotten power or wisdom, because, as Augustine proves in the sixth book On the Trinity, it would follow that the Father would have his being from the Son, because this is for God to be, namely to be strong and wise. Then when he says because that which is foolish of God, he assigns the reason for what he had said, saying how that which is weak and foolish can be the power or wisdom of God, because that which is foolish of God is wiser than men, as if he should say: now something divine seems to be foolish, not because it falls short of wisdom, but because it surpasses human wisdom. For men are accustomed to reckon foolish what exceeds their own understanding. Ecclesiasticus III, 25: many things above the sense of man have been shown to you. And that which is weak of God is stronger than men, because indeed nothing is called weak in God on account of a defect of power, but on account of an excess over human power, just as also he is called invisible, insofar as he exceeds human sense. Wisdom XII, 17: you show your power, who are not believed to be perfect in power. Although this can be referred to the mystery of the Incarnation: because that which is reckoned foolish and weak in God, on the part of the assumed nature, transcends all wisdom and power. Exodus XV, 11: who is like you among the strong, O Lord?”

“For the Jews require a sign,.... The Jews had always been used to miracles, in confirmation of the mission of the prophets sent unto them, and therefore insisted on a sign proving Jesus to be the true Messiah; except signs and wonders were wrought, they would not believe; and though miracles were wrought in great numbers, and such as never man did, they remained incredulous, and persisted in demanding a sign from heaven, and in their own way; and it was told them that no other sign should be given them, but that of the prophet Jonah, by which was signified the resurrection of Christ from the dead; this was given them, and yet they believed not, but went on to require a sign still; nothing but miracles would do with them, and they must be such as they themselves pleased: the Alexandrian copy, and some others, and the Vulgate Latin version, read "signs", in the plural number: and the Greeks seek after wisdom; the wisdom of the world, natural wisdom, philosophy, the reason of things, the flowers of rhetoric, the ornaments of speech, the beauties of oratory, the justness of style and diction; as for doctrines they regarded none, but such as they could comprehend with, and account for by their carnal reason, everything else they despised and exploded. Hence we often read (l) of , "the Grecian wisdom", or wisdom of the Greeks; which, the Jews say (m), lay in metaphors and dark sayings, which were not understood but by them that were used to it; the study of it was forbidden by them, though some of their Rabbins were conversant with it (n), (l) T. Bab Menachot, fol 99. 2. Bava Kama, fol. 82. 2. (m) Maimon & Bartenora in Misn. Sota, c. 9. sect. 14. (n) Shalshelet Hakabala, fol. 25. 1. Ganz. Tzemach David, par. 3. fol. 31. 2.”

“For the Jews require a sign - Instead of σημειον, a sign, ABCDEFG, several others, both the Syriac, Coptic, Vulgate, and Itala, with many of the fathers, have σημεια, signs; which reading, as undoubtedly genuine, Griesbach has admitted into the text. There never was a people in the universe more difficult to be persuaded of the truth than the Jews: and had not their religion been incontestably proved by the most striking and indubitable miracles, they never would have received it. This slowness of heart to believe, added to their fear of being deceived, induced them to require miracles to attest every thing that professed to come from God. They were a wicked and adulterous generation, continually seeking signs, and never saying, It is enough. But the sign which seems particularly referred to here is the assumption of secular power, which they expected in the Messiah; and because this sign did not appear in Christ, therefore they rejected him. And the Greeks seek after wisdom - Such wisdom, or philosophy, as they found in the writings of Cicero, Seneca, Plato, etc., which was called philosophy, and which came recommended to them in all the beauties and graces of the Latin and Greek languages.”

“The Jews, in the mean time, ask for miracles, such as God formerly wrought in their favour, and the Greeks, or the Gentiles, to be converted, expect from us, what they would look upon as the highest points of human wisdom and knowledge; for that which appeareth the foolishness of God, is wiser than men, and able to confound the highest human wisdom; and that which appeareth weakness of God, is stronger than men, who cannot hinder God from converting the world, by means and methods, that seem so disproportioned to this his design. (Witham) — Foolishness. That is to say, what appears foolish to the world in the ways of God, is indeed more wise: and what appears weakness, is indeed above all the strength and comprehension of man. (Challoner)”

“For--literally, "Since," seeing that. This verse illustrates how the "preaching" of Christ crucified came to be deemed "foolishness" (Co1 1:21). a sign--The oldest manuscripts read "signs." The singular was a later correction from Mat 12:38; Mat 16:1; Joh 2:18. The signs the Jews craved for were not mere miracles, but direct tokens from heaven that Jesus was Messiah (Luk 11:16). Greeks seek . . . wisdom--namely, a philosophic demonstration of Christianity. Whereas Christ, instead of demonstrative proof, demands faith on the ground of His word, and of a reasonable amount of evidence that the alleged revelation is His word. Christianity begins not with solving intellectual difficulties, but with satisfying the heart that longs for forgiveness. Hence not the refined Greeks, but the theocratic Jews were the chosen organ for propagating revelation. Again, intellectual Athens (Act 17:18-21, &c.) received the Gospel less readily than commercial Corinth.”