Is the belief that DHK and I have a Roman Catholic one? Or was it the well accepted belief of many of Christian theologians of the past?
John Gill's Exposition of the Bible
Luke 1:35
And the angel answered and said unto her…
The angel gave her an account of the manner in which what he had said should be effected, as well as observed some things for the strengthening of her faith.
The Holy Ghost shall come upon thee.
The words, "upon thee", are left out in the Syriac and Persic versions; but are retained in others, and in all copies: the formation of Christ's human nature, though common to all the three persons, yet is particularly, and most properly ascribed to the Spirit; not to the first person, the Father, lest it should be thought that he is only the Father of him, as man; nor to the second person, the Son, since it is to him that the human nature is personally united; but to the third person, the Spirit, who is the sanctifier; and who separated, and sanctified it, the first moment of its conception, and preserved it from the taint of original sin. His coming upon the virgin must be understood in consistence with his omnipresence, and immensity; and cannot design any local motion, but an effectual operation in forming the human nature of her flesh and substance; and not in the ordinary manner in which he is concerned in the formation of all men, (Job 33:4) but in an extraordinary way, not to be conceived of, and explained. The phrase most plainly answers to (le ab) , in frequent use with the Jews F24, as expressive of coition.
And the power of the Highest shall overshadow thee.
By "the power of the Highest" is not meant the Lord Jesus Christ, who is sometimes called the power of God; but rather the Holy Ghost, as before, who is styled the finger of God, and power from on high, (Luke 11:20) (24:49) unless it should be thought that the perfection of divine power common to all the three persons is intended: and so points out the means by which the wondrous thing should be performed, even by the power of God; and which should not only be employed in forming the human nature of Christ, but in protecting the virgin from any suspicion and charge of sin, and defending her innocence and virtue, by moving upon Joseph to take her to wife. In the word, "overshadow", some think there is an allusion to the Spirit of God moving upon the face of the waters, in (Genesis 1:2) when, (tpxrm) , he brooded upon them, as the word may be rendered; and which is the sense of it, according to the Jewish writers
From Matthew Henry's Commentary on Genesis 3:15:
Notice is here given them of three things concerning Christ:—(1.) His incarnation, that he should be the seed of the woman, the seed of that woman; therefore his genealogy (Lu. 3) goes so high as to show him to be the son of Adam, but God does the woman the honour to call him rather her seed, because she it was whom the devil had beguiled, and on whom Adam had laid the blame; herein God magnifies his grace, in that, though the woman was first in the transgression, yet she shall be saved by child-bearing (as some read it), that is, by the promised seed who shall descend from her, 1 Tim. 2:15. He was likewise to be the seed of a woman only, of a virgin, that he might not be tainted with the corruption of our nature; he was sent forth, made of a woman (Gal. 4:4), that this promise might be fulfilled. It is a great encouragement to sinners that their Saviour is the seed of the woman, bone of our bone, Heb. 2:11, 14. Man is therefore sinful and unclean, because he is born of a woman (Job 25:4), and therefore his days are full of trouble, Job 14:1. But the seed of the woman was made sin and a curse for us, so saving us from both.