{9} But God hath revealed them unto us by his Spirit: for the Spirit {k} searcheth all things, yea, the deep things of God.

(9) A question: if it surpasses the capacity of men, how can it be understood by any man, or how can you declare and preach it? By a special enlightening of God's Spirit, with which whoever is inspired, he can enter even into the very secrets of God.

(k) There is nothing so secret and hidden in God, but the Spirit of God penetrates it.

People's New Testament

2:10 But God hath revealed them unto us by his Spirit. These wonders of the love of God, not seen by eye, nor heard by ear, nor revealed to the senses, were revealed by the Spirit to the apostles ( to us ), and made known through them to full-grown Christians ( the perfect ) (1Co 2:6).

The Spirit searcheth all things. The Holy Spirit, imparted so freely to the apostles to lead them into all truth, is the Spirit of God (Joh 16:13). Hence this Spirit imparts a knowledge of

the deep things of God. The secrets of the divine wisdom are thus made known.

Wesley's Notes

2:10 But God hath revealed - Yea, and freely given, 1Co 2:12. Them to us - Even inconceivable peace, and joy unspeakable. By his Spirit - Who intimately and fully knows them. For the Spirit searcheth even the deep things of God - Be they ever so hidden and mysterious; the depths both of his nature and his kingdom.

Jamieson-Fausset-Brown Bible Commentary

10. revealed . by . Spirit-The inspiration of thoughts (so far as truth essential to salvation is concerned) makes the Christian (1Co 3:16; 12:3; Mt 16:17; Joh 16:13; 1Jo 2:20, 27); that of words, the PROPHET (2Sa 23:1, 2; 1Ki 13:1, 5), "by the word of the Lord" (1Co 2:13; Joh 20:30, 31; 2Pe 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 (Ps 25:14; Pr 3:32; Joh 7:17; 15:15).

unto us-the "perfect" or fully matured in Christian experience (1Co 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], (Lu 10:21).

the Spirit searcheth-working in us and with our spirits (compare Ro 8:16, 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], (Ga 3:14).

deep things of God-(Ps 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 (De 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].

Matthew Henry's Concise Commentary

2:10-16 God has revealed true wisdom to us by his Spirit. Here is a proof of the Divine authority of the Holy Scriptures, 2Pe 1:21. In proof of the Divinity of the Holy Ghost, observe, that he knows all things, and he searches all things, even the deep things of God. No one can know the things of God, but his Holy Spirit, who is one with the Father and the Son, and who makes known Divine mysteries to his church. This is most clear testimony, both to the real Godhead and the distinct person of the Holy Spirit. The apostles were not guided by worldly principles. They had the revelation of these things from the Spirit of God, and the saving impression of them from the same Spirit. These things they declared in plain, simple language, taught by the Holy Spirit, totally different from the affected oratory or enticing words of man's wisdom. The natural man, the wise man of the world, receives not the things of the Spirit of God. The pride of carnal reasoning is really as much opposed to spirituality, as the basest sensuality. The sanctified mind discerns the real beauties of holiness, but the power of discerning and judging about common and natural things is not lost. But the carnal man is a stranger to the principles, and pleasures, and actings of the Divine life. The spiritual man only, is the person to whom God gives the knowledge of his will. How little have any known of the mind of God by natural power! And the apostles were enabled by his Spirit to make known his mind. In the Holy Scriptures, the mind of Christ, and the mind of God in Christ, are fully made known to us. It is the great privilege of Christians, that they have the mind of Christ revealed to them by his Spirit. They experience his sanctifying power in their hearts, and bring forth good fruits in their lives.