ST. GREGORY NAZIANZUS - HE IS CALLED MAN

He is called Man, not only that through His Body He may be apprehended by embodied creatures, whereas otherwise this would be impossible because of His incomprehensible nature; also that by Himself He may sanctify humanity, and be as it were a leaven to the whole lump; and by uniting to Himself that which was condemned may release it from all, becoming for all men all things that we are, except sin; – body, soul, mind and all through which death reaches – and thus He became Man, who is the combination of all these; God in visible form, because He retained that which is perceived by mind alone. He is Son of Man, both on account of Adam and of the Virgin from whom He came; from the one as a forefather, from the other as His Mother, both in accordance with the law of generation and apart from it. He is Christ, because of His Godhead… 
Saint Gregory of Nazianzus (the Theologian), “The Fourth Theological Oration”