Look upon Mary, my beloved, how, when Gabriel entered in to her and she spoke with him words of enquiry: "How shall these things be?" and the minister of the Spirit gave reply to Mary and said: "It is easy for God, all things are simple for him"--how she held it true when she heard, and said: "Behold, his handmaid am I."
Therefore he came down, in a manner he knows, he stirred and came in a way that pleased him, he entered and dwelt in her without her perceiving, she received him, suffering nothing. He was in her womb like a babe, yet the whole world was full of him. Of his love he came down to renew the image of Adam grown old." - St. Thomas of Villanova, bishop.