Chapter II
6 Some men of great gifts, and very learned in the Holy Scriptures, who have, when an opportunity presented itself, done much by their writings to benefit the Church and promote the instruction of believers, have said that the invisible God is seen in an invisible manner, that is, by that nature which in us also is invisible, namely, a pure mind or heart. The holy Ambrose, when speaking of Christ as the Word, says: "Jesus is seen not by the bodily, but by the spiritual eyes;" and shortly after he adds: "The Jews saw Him not, for their foolish heart was blinded," showing in this way how Christ is seen. Also, when he was speaking of the Holy Spirit, he introduced the words of the Lord, saying: "I will pray the Father, and He shall give you another Comforter, that He may abide with you for ever, even the Spirit of truth; whom the world cannot receive, because it sees Him not, neither knows Him;" and adds: "With good reason, therefore, did He show Himself in the body, since in the substance of His Godhead He is not seen. We have seen the Spirit, but in a bodily form: let us see the Father also; but since we cannot see Him, let us hear Him." A little after he says: "Let us hear the Father, then, for the Father is invisible; but the Son also is invisible as regards His Godhead, for no man has seen God at any time; and since the Son is God, He is certainly not seen in that in which He is God."
7. The holy Jerome also says: "The eye of man cannot see God as He is in His own nature; and this is true not of man only; neither angels, nor thrones, nor powers, nor principalities, nor any name which is named can see God, for no creature can see its Creator." By these words this very learned man sufficiently shows what his opinion was on this subject in regard not only to the present life, but also to that which is to come. For however much the eyes of our body may be changed for the better, they shall only be made equal to the eyes of the angels. Here, however, Jerome has affirmed that the nature of the Creator is invisible even to the angels, and to every creature without exception in heaven. If, however, a question arise on this point, and a doubt is expressed whether we shall not be superior to the angels, the mind of the Lord Himself is plain from the words which He uses in speaking of those who shall rise again to the kingdom: "They shall be equal unto the angels."
Whence the same holy Jerome thus expresses himself in another passage: "Man, therefore, cannot see the face of God but the angels of the least in the Church do always behold the face of God. And now we see as in a mirror darkly, in a riddle, but then face to face; when from being men we shall advance to the rank of angels, and shall be able to say with the apostle, We all, with unveiled face, beholding as in a mirror the glory of the Lord, are changed into the same image, from glory to glory, even as by the Spirit of the Lord; although no creature can see the face of God, according to the essential properties of His nature, and He is, in these cases, seen by the mind, since He is believed to be invisible."
8. In these words of this man of God there are many things deserving our consideration: first, that in accordance with the very clear declaration of the Lord, he also is of opinion that we shall then see the face of God when we shall have advanced to the rank of angels, that is, shall be made equal to the angels, which doubtless shall be at the resurrection of the dead. Next, he has sufficiently explained by the testimony of the apostle, that the face is to be understood not of the outward but of the inward man, when it is said we shall "see face to face;" for the apostle was speaking of the face of the heart when he used the words quoted in this connection by Jerome: "We, with unveiled face, beholding as in a mirror the glory of the Lord, are changed into the same image." If any one doubt this, let him examine the passage again, and notice of what the apostle was speaking, namely, of the veil, which remains on the heart of every one in reading the Old Testament, until he pass over to Christ, that the veil may be removed. For he there says: "We also, with unveiled face, beholding as in a mirror the glory of the Lord," in which face had not been unveiled in the Jews, of whom he says, "the veil is upon their heart," -- in order to show that the face unveiled in us when the veil is taken away is the face of the heart.
In fine, lest any one, looking on these things with too little care and therefore failing to discern their meaning, should believe that God now is or shall hereafter be visible either to angels or to men, when they shall have been made equal to the angels, he has most plainly expressed his opinion by affirming that "no creature can see the face of God according to the essential properties of His nature," and that "He is, in these cases, seen by the mind, since He is believed to be invisible." From these statements he sufficiently showed that when God has been seen by men through the eyes of the body as if He had a body, He has not been seen as to the essential properties of his nature, in which He is seen by the mind, since He is believed to be invisible-invisible, that is to say, to the bodily perception even of celestial beings, as Jerome had said above, of angels, and powers, and principalities. How much more, then, is He invisible to terrestrial beings!
9. Wherefore, in another place, Jerome says in still plainer terms, it is true not only of the divinity of the Father but equally of that of the Son md of that of the Holy Spirit, forming one nature in the Trinity, that it cannot be seen by the eyes of the flesh, but by the eyes of the mind, of which the Saviour Himself says: "Blessed are the pure in heart, for they shall see God."
What could be more clear than this statement? For if he had merely said that it is impossible for the divinity of the Father, or of the Son, or of the Holy Spirit, to be seen by the eyes of the flesh, and had not added the words, "but only by the eyes of the mind," it might perhaps have been said, that when the body shall have become spiritual it can no longer be called "flesh;" but by adding the words, "but only by the eyes of the mind," he has excluded the vision of God from every sort of body. Lest, however, any one should suppose that he was speaking only of the present state of being, observe that he has subjoined also a testimony of the Lord, quoted with the design of defining the eyes of the mind of which he had spoken; in which testimony a promise is given not of present, but of future vision: "Blessed are the pure in heart, for they shall see God."
Source: Letters (New Advent)