This meaning is affirmed in the Quran: that the Christ was surnamed
God's word, when he had been in heaven, before creating the fetus in the womb of Virgin Mary, and then God commanded Jesus to enter the body of the created fetus; Jesus obeyed and as such the Christ was flesh as you express it.
Because he was a spirit: one of the angels of the same kind as Gabriel.
Quran 3: 45, which means:
{
And when the angels said: "Mary, God gives you glad tidings of [bearing a child, in spite of being virgin, who is] a Word [coming] from His [neighborhood in heaven] d, whose name [among people] is the Christ: Jesus, son of Mary e, honorable f in the World and in the Next Life, and one of those favorites brought close [before God in the ethereal heavens.]"}
.......................................................................
45
d i.e.
one of His angels in heaven; the Christ was surnamed "
the Word of God" in heaven, then he came down to the earth and entered in the body of the fetus which was formed in the womb of Mary.
45
e i.e. his name is Jesus son of Mary, and his title is the Christ; which means: they anointed his head with the oil perfume; the one who anointed him was John Baptist. This was a custom of the Children of Israel to whom they want to assign as their king to anoint his head with the aromatic oil.
45
f i.e. respected among people; and similarly he is respected and honorable in the Next Life.
http://quran-ayat.com/pret/3.htm#a3_45
quran-ayat.com/pret/3.htm#a3_45