Jesus is born from the Virgin Mary because he is the divine Son of God, the Saviour of the world. It is the formal teaching of the Orthodox Church that Jesus is not a “mere man” like all other men. He is indeed a real man, a whole and perfectly complete man with a human mind, soul and body. But he is the man which the Son and Word of God has become. Thus, the Church formally confesses that Mary should properly be called Theotokos, which means literally “the one who gives birth to God.” For the one born of Mary is, as the Orthodox Church sings at Christmas: “… he who from all eternity is God.”
Today the Virgin gives birth to the Transcendent One, and the earth offers a cave to the Unapproachable One!
Angels, with shepherds, glorify Him!
The wise men journey with the star!
Since for our sake the eternal God was born as a little child!
(Kontakion of the Nativity)
Jesus of Nazareth is God, or, more accurately, the divine Son of God in human flesh. He is a true man in every way. He was born. He grew up in obedience to his parents. He increased in wisdom and stature
He had a family life with “brethren”
who according to Orthodox doctrine were not children born of Mary who is confessed as “ever-virgin,” but were either cousins or children of Joseph.