Jesus Christ takes flesh from Virgin Mary St. Cyril of Alexandria

“Now then, to say that the Word became flesh is the same thing as saying that he, like us, became a sharer in flesh and blood (cf. Heb 2:14). He took our body for his own and as a man was born of a woman, without losing his divinity or his birth from the Father, but remaining what he was, even when he assumed flesh.

This is what the orthodox faith affirms everywhere; this is what we find in the works of the holy Fathers. That is why they do not hesitate to call the holy Virgin Theotókos, not in the sense that the divine nature of the Word took its origin from the holy Virgin, but in the sense that he took his holy body, gifted with a rational soul, from her. Yet, because the Word is hypostatically united to this body, one can say that he was truly born according to the flesh.

I am writing these things even now, impelled by the love of Christ, exhorting you as a brother, entreating you in the sight of God and of his chosen angels, to believe and teach these truths together with us in order to keep peace among the Churches, and so that the bond of concord and love among the priests of God may remain unbreakable.”

Cyril of Alexandria, Letter II to Nestorius; PG 77, 44-49; ACO 1, 1, 1, 25-28