Luke 1:35-80

Ver. 35. And the Angel answered... the Holy Ghost shall come upon thee, &c. Mark here that the Incarnation is limited only to the Person of the Word, or Son of God: for He alone was incarnate and made man, and not the Father nor the Holy Spirit: and yet the incarnation was the work of the whole Trinity, as its efficient cause and not only of the Son. Yet this work of the Incarnation is appropriated to the Holy Spirit, first, because it was a most holy work; secondly, because the works relating to our redemption, and those which most display God's goodness are appropriated to the Holy Spirit, because He proceeds forth as the ideal love of the Father and the Son: in the same way wisdom is appropriated to the Son as the Word, and omnipotence to the Father as the first principle and origin. Moreover, the Holy Spirit was the framer of the humanity of Christ, because He fashioned and animated it, but He cannot be called its Father, because He did not contribute or communicate anything to it of His own substance. S. Augustine (Enchirid. c. 28).

Further S. Cyril (Catech. 12) shows that a virgin by the power of God could conceive and bring forth; and first, in arguing with the Gentiles, he says, "How is it that ye, who say that stones when thrown were changed into men, maintain that a virgin cannot bring forth? How is it that, ye, who fable that a daughter was born out of the head of Jupiter, maintain that it is impossible that one can be born of a virgin's womb?" And then, arguing with the Jews, he says, "Sara was barren, and she brought forth a child beyond the way of nature at an age when women have lost the power (to do so): either then deny both, or grant both, for the same God was the worker of both." He further says, that God out of the virgin Adam formed a virgin woman, namely Eve; why could He not then in like manner form a virgin man out of a virgin woman?

Shall come upon thee. In order that the conception of Christ, and Christ Himself, might be holy, not only by reason of the hypostatic union with the Word, but also by reason of so divine a conception, for He was conceived not by a man or an angel, but by the Holy Ghost. Wherefore Christ, by virtue of this conception, was not the son of Adam, so as to derive original sin from him, and be born a sinner, as we all are born, but He was most pure and most holy.

Again Christ was conceived by the Holy Ghost, because it was fitting, since He was both God and man, that both should be recognised in the conception. For the conception itself declares that He was Man; for He would not have been conceived unless He had been man; and the manner of the conception shows that He was also God; for to be conceived by a virgin without a husband, shows that He who was conceived was more than man.

Mystically, S. Cyril of Jerusalem (Catech. 12) says, the Lord willed to be born of a virgin, to signify that His members would be born according to the Spirit of the Church, which is a virgin.

Lactantius gives another reason, which is that Christ, Who in heaven is α̉μήτωζ, without a mother, might be on earth α̉πάτωζ, without a father. But the first reason is the chief one, namely, that Christ might be born without original sin.

Proclus (Hom. de Nativ.) says, "Mary is both handmaid and mother, both virgin and heaven itself. She is the one bridge by which God comes down to man. She is the wonderful web of that economy, of whom and in whom, in a certain ineffable manner, the admirable fabric of that union was wrought, of which the Holy Spirit was the weaver, the power overshadowing from on high was the spinner; the wool was the old and rough garment of Adam; the woof was the pure flesh of the Virgin; the weaver's shuttle was the immeasurable grace of her who was with child; the artificer was the Word which passed in through the hearing."

The power of the Highest, &c. According to Euthymius and Maldonatus, the power of the Highest is the Holy Spirit, Who with power brings the holy works of God to perfection, so that these words are an explanation of what the angel had said, the Holy Ghost shall come upon thee. So Christ (cap. Luke 24:49) says to the Apostles, Tarry in this city (Jerusalem) until ye be endued with power from on high, i.e. with the Holy Spirit. This it is of which the Church speaks, "Almighty and everlasting God, Who by the co-operation of the Holy Spirit didst prepare the body and soul of the glorious Virgin Mother Mary that she might be worthy to be made a fit habitation for thy Son."

Shall overshadow thee. S. Gregory (33 Moral. c. 2) explains thus, "The Word of God in thee will assume a body, which will be as it were a shadow of Deity, for it will as a shadow veil and conceal It." And again he says (18 Moral 12), "The human body in thee shall receive the incorporeal light of Divinity." Origen says also that the Body of Christ is called a shadow, because in the Passion it was humiliated and obscured after the manner of a shadow.

S. Ambrose (on Psalms 119) understands by the shadow this present and mortal life which the Spirit gave to Christ, for this is, as it were, a shadow of the true life and of eternity.

S. Augustine (Quæst. V. et N. T. c. 15) says , The power of the Highest shall overshadow thee, i.e. shall attemper itself to thee, as a shadow adjusts itself to a body, for thy human weakness could not contain the fulness of its force and power.

But more simply, the meaning is, It will cover thee as with a veil, i.e., will secretly work a mighty operation in thee; for it will be such and so great a one that no man or angel can penetrate into or comprehend it. For, first, it will form in thee the perfect humanity of Christ; and, secondly, it will unite the same in a certain ineffable manner to the Person of the Word.

Again, to overshadow may be taken as answering to the Hebrew word ענז, to cover with a cloud, and so to rain upon, for a cloud pours forth rain, and hence by the shadow and the cloud is signified rain, which is poured forth from the cloud and renders the earth fruitful. An allusion seems to be made to Psalms 72:6, He shall come down like the rain into a fleece of wool.

Wherefore that Holy Thing which shall be born of Thee shall be called the Son of God. Because the Holy Spirit will come upon thee, and cause thee to conceive a son, the Son which shall be born of thee will be holy from His very conception, yea, the Holy of Holies, because He will be called, and through His hypostatic union with the Word will truly be, the natural and Only Begotten Son of God, and will be called so by God, by angels, and by men; for He who is conceived by the Holy Spirit must needs be most Holy. Maldonatus somewhat differently says, "Jesus is called the Son of God, because He will not be begotten as the rest of men are, but by God through the power of the Spirit, and therefore He will be holy, and the Son of God." So (Luke 3:38) Adam is called the Son of God, because he was created not by man but by God.

He says, That Holy Thing, not Man, to show that this Son will not be a mere man, but besides being, a man will also be God (S. Greg. xviii . Moral. c. 27); and also to declare that Jesus will be holy with a holiness altogether perfect and natural on account of the hypostatic union (Suarez, iii... disp. 18 sect. 1): so that the meaning is, Jesus, Who will be born of thee, will be Most Holy, yea, Holiness itself

S. Bernard (Serm. 4 super Missus Est) says, "Why does he say merely that Holy Thing, and no more? Because there was not any proper or worthy expression that he could use. If he had said that holy flesh, or that holy man, or whatever expression of such a kind he had used, he would have seemed to himself to have said but little. He uses, therefore, the indefinite expression, That Holy Thing; because whatever it was that the Virgin brought forth, It was without doubt holy and in a singular manner holy, both through the sanctification of the Spirit and the assumption of the Word."

The Son of God by nature, Who would make all the faithful, sons of God by grace.