John Calvin Commentary 1 Corinthians 2:10

"But unto us God revealed [them] through the Spirit: for the Spirit searcheth all things, yea, the deep things of God." — 1 Corinthians 2:10 (ASV)

But God has revealed them to us. Having confined all mankind in blindness, and having taken away from the human intellect the power of attaining a knowledge of God by its own resources, He now shows how believers are exempted from this blindness: by the Lord honoring them with a special illumination of the Spirit. Hence, the greater the dullness of the human intellect in understanding the mysteries of God, and the greater the uncertainty with which it struggles, the surer our faith is, which rests on the revelation of God’s Spirit. In this, too, we recognize the unbounded goodness of God, who makes our defect contribute to our advantage.

For the Spirit searches all things. This is added for the comfort of the godly, so that they may rest more securely in the revelation they have from the Spirit of God, as if He had said: “Let it be enough for us to have the Spirit of God as a witness, for there is nothing in God that is too profound for Him to reach.” For such is the meaning here of the word searcheth. By the deep things, you must understand this to mean not secret judgments, which we are forbidden to search into, but the entire doctrine of salvation, which would have been set before us in the Scriptures to no purpose if God did not elevate our minds to it by His Spirit.