In the Servant of God Father Luigi Giussani’s Meditations on the Holy Rosary, he writes about the Annunciation:
The Angel’s words could have astounded with wonder and humility the young woman to whom they were addressed. But they were not so astounding as to be totally unintelligible; they contained something that made them intelligible to the heart of that young girl who was living her religious duties. The Virgin embraced them to herself: “I am the handmaiden of the Lord. Let it be done to me according to Your word.” Not because she understood but, in the confusion that had become boundless because of the Mystery that announced itself by vibrating in her flesh, the Virgin opened her arms wide, the arms of her freedom, and said, “Yes.” And she stayed alert every day, every hour, every minute of her life. The Virgin Mary’s state of mind, that state of mind which determines an attitude and decides for it in the face of the occasion and the moment, how can we better describe the Virgin’s state of mind than with the word “silence”? Silence as memory filled to overflowing. Two things contributed to this memory, two things determined this silence. The first was remembering what had happened. What had happened preserved its marvelousness, its true mystery, its mystery of truth intact because — and this is the second thing — it had something that was present: that Child, that present young Man, that Son who was present.
Going to the Church Fathers is always a good thing: Saint Ireneus of Lyons teaches us that “For as Eve was seduced by an angel’s voice to turn from God betraying His word, so Mary was given the good news by an angel’s voice that she would bear God, and the latter was persuaded to obey God, so that Mary should become the advocate of Eve. And as the human race was bound to death by a virgin, by a virgin it was delivered.”