The interpretation timeline
1 Corinthians 2:10 Douay-Rheims

But to us God hath revealed them, by this Spirit. For the Spirit searcheth all things, yea, the deep things of God.

A.D. 202 – 1871 8 witnesses

Patristic

before A.D. 750
202
A.D.
Irenaeus Patristic
c. A.D. 130–202
“But as for us, we still dwell upon the earth, and have not yet sat down upon His throne. For although the Spirit of the Saviour that is in Him "searcheth all things, even the deep things of God," [1 Corinthians 2:10] yet as to us "there are diversities of gifts, differences of administrations, and diversities of operations;" and we, while upon the earth, as Paul also declares, "know in part, and prophesy in part." [1 Corinthians 13:9] Since, therefore, we know but in part, we ought to leave all sorts of [difficult] questions in the hands of Him who in some measure, [and that only,] bestows grace on us.”
Source
215
A.D.
c. A.D. 150–215
“For it is not spurious words which those inspired by God and those who are gained over by them adduce, nor is it snares in which the most of the sophists entangle the young, spending their time on nought true. But those who possess the Holy Spirit "search the deep things of God,"-that is, grasp the secret that is in the prophecies. "To impart of holy things to the dogs" is forbidden, so long as they remain beasts. For never ought those who are envious and perturbed, and still infidel in conduct, shameless in barking at investigation, to dip in the divine and clear stream of the living water.”
Source
407
A.D.
John Chrysostom Patristic
A.D. 347–407
“What kind of things then are these? That by what is esteemed to be the foolishness of preaching He shall overcome the world, and the nations shall be brought in, and there shall be reconciliation of God with men, and so great blessings shall come upon us! How then have we known? "Unto us," he saith, "God hath revealed them by His Spirit;" not by the wisdom which is without; for this like some dishonored handmaid hath not been permitted to enter in, and stoop down and look into the mysteries pertaining to the Lord. Seest thou how great is the difference between this wisdom and that? The things which angels knew not, these are what she hath taught us: but she that is without, hath done the contrary. Not only hath she failed to instruct, but she hindered and obstructed, and after the event sought to obscure His doings, making the Cross of none effect. Not then simply by our receiving the knowledge, does he describe the honor vouchsafed to us, nor by our receiving it with angels, but, what is more, by His Spirit conveying it to us. Then to show its greatness, he saith, If the Spirit which knoweth the secret things of God had not revealed them, we should not have learned them. Such an object of care was this whole subject to God, as to be among His secrets. Wherefore we needed also that Teacher who knoweth these things perfectly; for "the Spirit," saith he, "searcheth all things, even the deep things of God." For the word "to search" is here indicative not of ignorance, but of accurate knowledge: it is the very same mode of speaking which he used even of God, saying, "He that searcheth the hearts knoweth what is the mind of the Spirit." Then having spoken with exactness concerning the knowledge of the Spirit, and having pointed out that it is as fully equal to God's knowledge, as the knowledge of a man itself to itself; and also, that we have learned all things from it and necessarily from it; he added, "which things also we speak, not in words which man's wisdom teacheth, but which the Holy Ghost teacheth; comparing spiritual things with spiritual." Seest thou to what point he exalted us because of the Teacher's dignity? For so much are we wiser than they as there is difference between Plato and the Holy Spirit; they having for masters the heathen rhetoricians but we, the Holy Spirit.”
Source

Scholastic

c. 1100 – 1500
1272
A.D.
Thomas Aquinas Catholic
1225–1274
“Having set forth the exposition concerning the wisdom of which the Apostle speaks among the perfect, here he assigns the reason for the aforesaid exposition, and first as to this, that he had described it by comparison to unbelievers; second, as to this, that he had described it by comparison to believers, at *but to us God has revealed*. Concerning the first he does two things. First he sets forth what he intends; second he proves the proposition, at *for if they had known*. He says therefore first: it was said that the wisdom which we speak is not of the princes of this age, for this is the wisdom which none of the princes of this age has known, which is true, of whatever princes it be understood. For secular princes have not known this wisdom, because it exceeds the reason of human governance. Job 12: *who changes the heart of the princes of the people of the earth, and deceives them, that they may walk in vain where there is no way*. Philosophers also have not known it, because it exceeds human reason. Whence it is said Bar. 3:23: *the seekers of prudence and of knowledge have not known the way of wisdom*. Demons also do not know it, because it exceeds all created wisdom. Whence it is said Job 28:21: *the birds of the heaven also are hidden from it. Destruction and death have said: with our ears we have heard the report of it*. Then when he says *for if they had known*, etc., he proves what he had said, and first indeed he proves by a sign that the princes did not know the wisdom of God, according as it is hidden in itself. Second he proves by authority that they did not know it, according as it is prepared unto our glory, at *as it is written*. He says therefore first: rightly do I say that the princes of this age have not known the wisdom of God, for if they had known the wisdom of God, they would surely have known Christ to be God, who is contained in this wisdom, which being known, they would never have crucified the Lord of glory, that is, Christ the Lord himself giving glory to his own, according to that Ps. 23:10: *the Lord of hosts, he is the King of glory*; and Heb. 2:10: *who had brought many sons into glory*. For since glory is naturally desirable to a rational creature, it cannot fall into human will that one should slay the author of glory. But that the princes crucified Jesus Christ is certain, if it be understood of the princes who have power among men. For it is said in Ps. 2:2: *the kings of the earth stood up, and the princes gathered together as one against the Lord, and against his Christ*, which Acts 4:27 expounds of Herod and Pilate, and the princes of the Jews who consented to the death of Christ. But demons too worked toward the death of Christ, by persuading, according to that Jn. 13:2: *when the devil had now put into the heart that he should betray him*, et cetera. But also the Pharisees, and the Scribes learned in the law, who devoted their study to wisdom, worked toward the death of Christ by instigating and approving. But concerning this a twofold doubt arises, of which the first is concerning this, that he says the Lord of glory was crucified. For the divinity of Christ could not suffer anything, according to which Christ is called Lord of glory. But it must be said that Christ is one person and hypostasis subsisting in each nature, namely divine and human. Whence he can be designated by the name of either nature, and by whatever name he is signified, that which belongs to either nature can be predicated of him, because to each there is not supposed except one hypostasis. And in this way we can say that a man created the stars, and that the Lord of glory was crucified, and yet he did not create the stars according as he is man, but according as he is God, nor was he crucified according as he is God, but inasmuch as he is man. Whence by this word the error of Nestorius is destroyed, who had said that there was one nature in Christ, of God and of man, because according to this it could in no way be verified that the Lord of glory was crucified. The second doubt is concerning this, that he seems to suppose that the princes of the Jews or the demons did not know Christ to be God. And indeed, as to the princes of the Jews, this seems to be established by this, that Peter says, Acts 3:17: *I know that through ignorance you did this, as did also your princes*. But it seems to be contrary what is said Matt. 21:38: *the husbandmen, seeing the son, said among themselves: this is the heir, come, let us kill him*; which Chrysostom, expounding, says: *the Lord manifestly proves by these words that the princes of the Jews crucified the Son of God not through ignorance, but through envy*. It is resolved in the Gloss that the princes of the Jews knew him to be the one who was promised in the law, yet not the mystery of him, that he was the Son of God, nor did they know the sacrament of the incarnation and redemption. But against this seems to be what Chrysostom says, that they knew him to be the Son of God. It must be said therefore that the princes of the Jews knew for certain that he was the Christ promised in the law, which the people did not know. But that he was truly the Son of God they did not know for certain, but conjectured it in some way; but this conjectural knowledge was obscured in them by envy and by desire of their own glory, which they saw diminished by the excellence of Christ. Likewise also there seems to be a doubt concerning the demons. For it is said Mk. 1:23 ff. and Lk. 4:34, that the demon cried out, saying: *I know that you are the Holy One of God*. And lest this be ascribed to the presumption of the demons, who boasted of knowing what they did not know, their knowledge which they had of Christ is asserted by the Evangelists themselves. In Mark indeed it is thus written: *he did not allow them to speak*, namely the demons, *because they knew him to be the Christ*. And Luke says: *rebuking them he did not allow them to speak because they knew him to be the Christ*. And to this it is answered in the book of Questions of the New and Old Testament, that the demons knew him to be the one who was promised through the law, because they saw in him all the signs which the prophets had said, but they were ignorant of the mystery of his divinity. But against this seems to be what Athanasius says, that the demons called Christ the Holy One of God, as it were singularly holy: for he alone is naturally holy, by participation in whom all others are called holy. But it must be said that, as Chrysostom says, they did not have firm and certain knowledge of the coming of God, but certain conjectures. Whence Augustine says in Bk. 9 of the City of God that he became known to the demons, not through that which is eternal life, but through certain temporal things wrought by his power. Then when he says *but as it is written*, he proves by authority that the princes of this age did not know the wisdom of God, as to this, that it was predestined unto the glory of the faithful, saying: *but as it is written*, Is. 64:4, where our text has: *eye has not seen, O God, besides you, what you have prepared for those who love you*. Now that glory of vision is shown to be plainly unknown to men in two ways. First indeed, that it is not subject to human senses, from which all human knowledge takes its beginning. And he sets down two senses. First the sense of sight, which serves discovery, when he says that *eye has not seen*, Job 28:7: *the path of it the bird has not known, nor has the eye of the vulture looked upon it*. And this because it is not something colored and visible. Second he sets down the sense of hearing, which serves instruction, saying *nor has ear heard*, namely that glory itself, because it is not sound or sensible voice. Jn. 5:37: *neither have you seen his shape, nor have you heard his voice*. Then he excludes intellectual knowledge of it, when he says *neither has it ascended into the heart of man*. This indeed can be understood: in one way, that whatever is known by man in any way whatsoever is said to ascend into the heart of man, according to that Jer. 2:50: *let Jerusalem ascend upon your heart*: and thus it must be that the heart of man is taken for the heart of the carnal man, according to that which is said below in ch. 3:3: *since there is among you jealousy and contention, are you not carnal, and do you not walk according to man?* The sense therefore is that that glory is not only not perceived by sense, but not even by the heart of the carnal man, according to that Jn. 14:17: *whom the world cannot receive, because it does not see him, nor know him*. In another way it can be expounded according as that is properly said to ascend into the heart of man which comes from below to man's intellect, namely from things sensible, of which he had made mention before. For things are in the intellect according to its mode; therefore lower things are in a higher intellect in a higher mode than in themselves. And therefore when they are grasped by the intellect, they in a certain way ascend into the heart. Whence it is said Is. 65:17: *the former things shall not be in memory, nor shall they ascend upon the heart*. But those things which are in the intellect and are themselves higher, are in themselves in a higher mode than in the intellect. And therefore when they are grasped by the intellect, they in a certain way descend. James 1:17: *every perfect gift is from above, descending from the Father of lights*. Because therefore the knowledge of that glory is not received from things sensible, but from divine revelation, therefore he says pointedly *neither has it ascended into the heart of man*, but it descends, namely that which *God has prepared*, that is, predestined, *for those who love him*, because the essential reward of eternal glory is owed to charity, according to that Jn. 14:21: *if anyone loves me, he will be loved by my Father, and I will love him and will manifest myself to him*, in which the perfection of eternal glory consists; and Job 36:33: *he declares concerning it*, that is, concerning the light of glory, *to his friend, that it is his possession*. But the other virtues receive the efficacy of meriting eternal life, inasmuch as they are informed by charity. Then when he says *but to us*, etc., he proves the aforesaid exposition concerning divine wisdom by comparison to believers. And first he sets forth what he intends; second he proves the proposition, at *for the Spirit*. He says therefore first: it was said that no one of the princes of this age knew the wisdom of God, *but to us God has revealed* it *through his Spirit*, namely whom he has sent to us, according to that Jn. 14:26: *but the Paraclete, the Holy Spirit, whom the Father will send in my name, he will teach you all things*, Job 32:8: *the inspiration of the Almighty gives understanding*. For because the Holy Spirit is the Spirit of truth, as proceeding from the Son, who is the truth of the Father, he inspires truth into those to whom he is sent, just as the Son, sent by the Father, makes known the Father, according to that Matt. 11:27: *no one knows the Father except the Son, and he to whom the Son will reveal him*. Then when he says *for the Spirit*, he proves what he had said, namely that through the Holy Spirit wisdom was revealed to believers. And first he shows that the Holy Spirit is efficacious for this; second he proves that this he had done in the disciples of Christ, at *but we*. Concerning the first he does two things. First he sets forth what he intends; second he manifests the proposition, at *for who of men knows*, et cetera. He says therefore first: it was said that through the Holy Spirit God has revealed to us his wisdom, and this could come about: for *the Spirit searches all things*. This is not to be understood as though by inquiring how things come to be, but because he knows perfectly and even the inmost things of whatsoever matters, just as a man sometimes diligently searches. Whence it is said Wis. 7:22f. that *the spirit of understanding is holy, watching over all things, and taking in all spirits that are intelligible, pure, subtle*, and he knows perfectly not only created things, but also the deep things of God. Now those things are called deep which lie hidden in him, and not those things which are known of him through creatures, which are seen as it were only on the surface, according to that Wis. 13:5: *from the greatness of the beauty and of the creature the creator of them can knowably be seen*. Then, when he says *for who of men knows*, he proves what he had said concerning the Spirit of God by a likeness of the human spirit, saying *for who of men knows the things that are of man*, that is, the things that lie hidden in the heart, *except the spirit of man which is in him*, that is, the intellect? And therefore the things that lie hidden within cannot be seen. He says pointedly, however, *who of men*, lest even God should seem to be excluded from knowledge of these things; for it is said Jer. 17:9: *perverse is the heart of man, and who shall know it? I, God, proving hearts and searching reins*, because indeed of the secrets of the heart God alone is the knower. Now the reason is manifest why man cannot know the things that lie hidden in another's heart, because man's knowledge is received from sense, and therefore the things that are in another's heart, man cannot know, except insofar as they are made manifest through sensible signs, according to that 1 Kg. 16:7: *man sees the things that appear outwardly, but God beholds the heart*. But neither can a good angel nor a bad one know the things that lie hidden in man's heart, except insofar as they are made manifest through certain effects, the reason for which can be taken from the very word of the Apostle, who says the spirit of man knows the things that lie hidden in man's heart for this reason, that it is in the man himself; but an angel, whether good or bad, does not glide into the human mind so as to be in man's very heart and operate within it, but this belongs to God alone. Whence God alone is conscious of the secrets of man's heart, according to that Job 16:20: *behold, my witness is in heaven, and my knower is on high*. Second he adapts the likeness to the Spirit of God, saying *so too the things that are of God*, that is, the things that lie hidden in God himself, *no one knows, except the Spirit of God*, according to that Job 36:26: *behold, God is great, surpassing our knowledge*. But just as the things that are in one man's heart are made manifest to another through sensible signs, so the things that are of God can be known to man through sensible effects, according to that Wis. 13:5: *from the greatness of the beauty and of the creature*, et cetera. But the Holy Spirit, who is in God himself, as consubstantial with the Father and the Son, sees the secrets of the divinity through himself, according to that Wis. 7:22: *for in her*, namely the wisdom of God, *is the spirit of understanding, holy, having all power, watching over all things*. Then, when he says *but we*, etc., he shows how the knowledge of the Holy Spirit is received, saying: although no man of himself can know the things that are of God, *but we*, namely filled with the Holy Spirit, *have not received the spirit of this world, but the Spirit who is from God*. Now by the name "spirit" is understood a certain vital and cognitive and motive force. The spirit of this world, then, can be called the wisdom of this world, and the love of the world, by which man is driven to do the things that are of the world; but this spirit the holy apostles did not receive, casting off and despising the world, but they received the Holy Spirit, by whom their hearts were illumined and enkindled to the love of God, according to that Jn. 14:26: *but the Paraclete, the Holy Spirit, whom the Father will send in my name*, etc., and Num. 14:24: *my servant Caleb, who is full of another spirit, and has followed me, I will bring into this land*. But the spirit of this world causes error, according to that Is. 19:3: *the spirit of Egypt shall be broken in the midst thereof, and I will cast down its counsel*. From the divine spirit, however, we have obtained *that we may know the things that are given to us by God*, that we may know concerning divine matters as much as God has granted to each; because, as is said Eph. 4:7, *to each one grace is given according to the measure of the gift of Christ*. Or it can be understood that the Spirit of God is given to the saints, that they may know spiritual gifts, which, not having, they are ignorant of that same Spirit, according to that Apoc. 2:17: *to him who overcomes I will give hidden manna, which no one knows except he who receives it*. From this, however, it can be gathered that just as *no one knows the Father except the Son, and he to whom the Son will reveal him*, as is said Matt. 11:27: so no one knows the things that are of God the Father and the Son, except the Holy Spirit and those who have received him: and this because just as the Son is consubstantial with the Father, so the Holy Spirit is with the Father and the Son.”

Post-Reformation

c. 1650 – 1900
1771
A.D.
John Gill Reformed
1697–1771
“For what man knoweth the things of a man,.... The thoughts of a man's heart, the conceptions of his mind, the schemes he is drawing there, his designs, purposes, and intentions; these can never be known by another man, no, nor by angels or devils; not by any creature; by none save the spirit of a man which is in him? which is only conscious to, and can only make known the things that are in him: even so the things of God knoweth no man, but the Spirit of God; and which, as it proves how secret, hidden, unknown, the mysteries of grace are, until revealed by the Spirit; so it gives full evidence to the deity of the Holy Ghost, and clearly shows he must be God, who is in him, knows the thoughts of his heart, the counsels of his mind, his purposes and decrees, and what is contained in them.”
Source
1832
A.D.
Adam Clarke Methodist
1762–1832
“But God hath revealed them unto us - A manifest proof that the apostle speaks here of the glories of the Gospel, and not of the glories of the future world. For the Spirit searcheth all things - This is the Spirit of God, which spoke by the prophets, and has now given to the apostles the fullness of that heavenly truth, of which He gave to the former only the outlines. Yea, the deep things of God - It is only the Spirit of God which can reveal the counsels of God: these are the purposes which have existed in His infinite wisdom and goodness from eternity; and particularly what refers to creation, providence, redemption, and eternal glory, as far as men and angels are concerned in these purposes. The apostles were so fully convinced that the scheme of redemption proclaimed by the Gospel was Divine, that they boldly asserted that these things infinitely surpassed the wisdom and comprehension of man. God was now in a certain way become manifest; many attributes of his, which to the heathen world would have for ever lain in obscurity, (for the world by wisdom knew not God), were now not only brought to light as existing in him, but illustrated by the gracious displays which He had made of himself. It was the Spirit of God alone that could reveal these things; and it was the energy of that Spirit alone that could bring them all into effect - stamp and seal them as attributes and works of God for ever. The apostles were as truly conscious of their own inspiration as they were that they had consciousness at all; and what they spoke, they spoke as they were moved by the Holy Ghost.”
Source
1849
A.D.
1774–1849
“But to us God hath revealed them by his Spirit; these mysteries, and secrets of the divine wisdom. — For the Spirit searcheth all things: the divine Spirit, the Holy Ghost, searcheth all things, and none but this Spirit of God, that is, this Spirit, which is God, knoweth the things that are of God, as none but the spirit that is in man, knoweth the things of man, knoweth his thoughts and interior affections. But by the Spirit of God, we may understand the spirit of grace, of knowledge, of prophecy, which God hath given to his faithful, and particularly to his apostles, to raise them to a higher knowledge of the divine mysteries. (Witham)”
Source
1871
A.D.
1871
“revealed . . . by . . . Spirit--The inspiration of thoughts (so far as truth essential to salvation is concerned) makes the Christian (Co1 3:16; Co1 12:3; Mat 16:17; Joh 16:13; Jo1 2:20, Jo1 2:27); that of words, the PROPHET (Sa2 23:1-2; Kg1 13:1, Kg1 13:5), "by the word of the Lord" (Co1 2:13; Joh 20:30-31; Pe2 1:21). The secrets of revelation are secret to some, not because those who know them will not reveal them (for indeed, the very notion of revelation implies an unveiling of what had been veiled), but because those to whom they are announced have not the will or power to comprehend them. Hence the Spirit-taught alone know these secrets (Psa 25:14; Pro 3:32; Joh 7:17; Joh 15:15). unto us--the "perfect" or fully matured in Christian experience (Co1 2:6). Intelligent men may understand the outline of doctrines; but without the Holy Spirit's revelation to the heart, these will be to them a mere outline--a skeleton, correct perhaps, but wanting life [WHATLEY, Cautions for the Times, 14], (Luk 10:21). the Spirit searcheth--working in us and with our spirits (compare Rom 8:16, Rom 8:26-27). The Old Testament shows us God (the Father) for us. The Gospels, God (the Son) with us. The Acts and Epistles, God (the Holy Ghost) in us [MONOD], (Gal 3:14). deep things of God-- (Psa 92:5). His divine nature, attributes, and counsels. The Spirit delights to explore the infinite depths of His own divine mind, and then reveal them to us, according as we are capable of understanding them (Deu 29:29). This proves the personality and Godhead of the Holy Ghost. Godhead cannot be separated from the Spirit of God, as manhood cannot be separated from the Spirit of man [BENGEL].”
Source
Modern · 1953 →

The in-app commentary runs from the Fathers to the early-modern record, then stops — that's where the public-domain sources end, not where the reading does. For the modern reading, follow the sources directly.