The Irradiating Light of the Holy Spirit

34. But as Paul argues, “What man knoweth the things of a man, save the spirit of man which is in him? even so the things of God knoweth no man but the Spirit of God,” (1 Cor. 2:11). If in regard to divine truth we hesitate even as to those things which we see with the bodily eye, how can we be firm and steadfast in regard to those divine promises which neither the eye sees nor the mind comprehends? Here human discernment is so defective and lost, that the first step of advancement in the school of Christ is to renounce it (Mt. 11:25; Luke 10:21). Like a veil interposed, it prevents us from beholding divine masteries, which are revealed only to babes. “Flesh and blood” does not reveal them (Mt. 16:17). “The natural man receiveth not the things of the Spirit of God: for they are foolishness unto him; neither can he know them, for they are spiritually discerned,” (I Cor. 2:14). The supplies of the Holy Spirit are therefore necessary, or rather his agency is here the only strength. “For who has known the mind of the Lord? or who has been his counselor?” (Rom. 11:34); but “The Spirit searcheth all things, yea, the deep things of God,” (1 Cor. 2:10). Thus it is that we attain to the mind of Christ: “No man can come to me, except the Father which has sent me draw him: and I will raise him up at the last day.” “Every man therefore that has heard, and learned of the Father, cometh unto me. Not that any man has seen the Father, save he which is of God, he has seen the Father,” (John 6:44, 45, 46). Therefore, as we cannot possibly come to Christ unless drawn by the Spirit, so when we are drawn we are both in mind and spirit exalted far above our own understanding. For the soul, when illumined by him, receives as it were a new eye, enabling it to contemplate heavenly mysteries, by the splendor of which it was previously dazzled. And thus, indeed, it is only when the human intellect is irradiated by the light of the Holy Spirit that it begins to have a taste of those things which pertain to the kingdom of God; previously it was too stupid and senseless to have any relish for them. Hence our Savior, when clearly declaring the mysteries of the kingdom to the two disciples, makes no impression till he opens their minds to understand the Scriptures (Luke 24:27, 45). Hence also, though he had taught the Apostles with his own divine lips, it was still necessary to send the Spirit of truth to instill into their minds the same doctrine which they had heard with their ears. The word is, in regard to those to whom it is preached, like the sun which shines upon all, but is of no use to the blind. In this matter we are all naturally blind; and hence the word cannot penetrate our mind unless the Spirit, that internal teacher, by his enlightening power make an entrance for it.

Calvin, J. (1997). Institutes of the Christian religion.(III, ii, 34)