“He is born, but he has already been generated; he is born of a woman, but also from a Virgin. The former is human, the latter divine. In his human nature, he has no father; in his divine nature, he has no mother. Both of these [conditions] belong solely to divinity.
He was dwelling in her womb, but he was recognized by the Prophet who, while himself still dwelling in the womb, began to rejoice at the nearness of the Word for whose sake he was born.”
Gregory Nazianzen, Sermon 29, 19; PG 36, 100 A-B.
If you are interested in more quotes on Virgin Mary, you can find them in Mary and the Fathers of the Church on Amazon in both in Kindle and paperback formats.
References:
Gambero, L., 1999. Mary and the Fathers of the Church 1st ed. Translated by Buffer, T., San Francisco: Ignatius Press.
Virgin Mary 
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