“And the angel answered and said unto her, The Holy Ghost shall come upon thee, and the power of the Highest shall overshadow thee: therefore also that holy thing which shall be born of thee shall be called the Son of God.”
Luke 1:35 — Greek Interlinear
Church Fathers on Luke 1:35
It was Mary’s part neither to refuse belief in the Angel, nor too hastily take to herself the divine message. How subdued her answer is, compared with the words of the Priest. Then said Mary to the Angel, How shall this be? She says, How shall this be? He answers, Whereby shall I know this? He refuses to believe that which he says he does not know, and seeks as it were still further authority for belief. She avows herself willing to do that which she doubts not will be done,…
Hear the chaste words of the Virgin. The Angel tells her she shall bear a son, but she rests upon her virginity, deeming her inviolability a more precious thing than the Angel’s declaration. Hence she says, Seeing that I know not a man.
Knowledge is spoken of in various ways. The wisdom of our Creator is called knowledge, and an acquaintance with His mighty works, the keeping also of His commandments, and the constant drawing near to Him; and besides these the marriage union is called knowledge as it is here.