"SO then, after the assent of the holy Virgin, the Holy Spirit descended on her, according to the word of the Lord which the angel spoke, purifying her, and granting her power to receive the divinity of the Word, and likewise power to bring forth."
~St. John Damascene: An Exposition of the Orthodox Faith, Bk. III, Ch. 2.
The Annunciation, by Fra Angelico.
Tempera on wood, 1430-32; Museo del Prado, Madrid.