Pope Saint Leo the Great Quote

That "the Word was made flesh" does not mean that the nature of God was changed into flesh, but that flesh was assumed by the Word into the unity of His person. The word "flesh" moreover signifies the whole man, with whom the Son of God so inseparably united Himself within the womb of the Virgin, fecundated by the Holy Spirit and destined to remain for ever virginal, that He who was begotten of the essence of the Father before time, in time was born of the Virgin's womb. For in no other way could we be released from the chains of eternal death, except He become humble in our nature who remained almighty in His own.

– Pope Saint Leo the Great