If there be a single verse in the Bible marked with the special emphasis of God the Holy Ghost, surely this is one. Every word tells. Here is the glorious person so much and so highly spoken of before under the name of the Word, declared to be made flesh. And this distinct from the person of either the Father or the Holy Ghost. It is the Son of God only. He is made flesh.
The original word translated flesh, is very strong. It is Sarx. The same word as is used in Rom 3:20, where no flesh is said to be justified. And elsewhere Christ is said to be made in the likeness of sinful flesh. Rom 8:3. And it is a word of the same significance with one in the Hebrew, used in Gen 6:12, corrupt flesh. So that no word of stronger import can be found to denote the vast humiliation of the Son of God in the assuming of our nature. Had the verse expressed that the Word was made Man, though the same nature would have been implied, yet it would not have been so strong, as to the point of degradation.
The word means our full nature, both of soul and body, complete man. And it is so very fully expressed by the word flesh, that the assumption implies the most perfect union of the both natures, divine and human. Not by any change or alteration of the one by the taking of the other; but by the junction forming and constituting one whole person, God and Man Mediator, the Lord Jesus Christ.
Augustine, when speaking of the word being made flesh said, "Not by changing what he was, but by taking what he was not." And what endears the whole, and renders it truly blessed to all his people who are members of his body, of his flesh, and of his bones, is, that this union of God and Man in one person, is indissoluble and for ever. Jesus Christ, the same yesterday, and to-day, and for ever. Heb 13:8.