As unheard of as this greeting was in human custom, so fitting was it to the dignity of blessed
Mary. And indeed, truly full of grace was she, upon whom it was conferred by divine favor that, first among women, she should offer God the most glorious gift of her virginity. Hence she who strove to imitate the life of an angel was rightfully worthy to enjoy the experience of seeing and speaking with an angel. Truly full of grace was she to whom it was granted to give birth to Jesus Christ, the very one through whom grace and truth came. And so the Lord was truly with her whom He first raised up from earthly to heavenly desires, in an unheard of love of chastity, and afterwards sanctified, by means of His human nature, with all the fullness of His divinity. Truly blessed among women was she who without precedent in the womanly state rejoiced in having the honor of [mother]hood along with the beauty of virginity, inasmuch as it was fitting that a virgin mother bring forth God the Son. ( Stthe Venerable) Bede
Yet for all her faith and faithfulness, for all her piety and strength, even this most holy and blessed and glorious woman trembled at the angelic message and pondered fearfully the meaning of his words. But do not suppose that she trembled because she was unwilling; or because she hesitated. Suppose, instead, that this most blessed virgin trembled because of her humility; because she did not consider herself deserving of such high honor; because she never supposed herself to be worthy of being—and being called—the Mother of God. So she trembles not for lack of faith, but in true faith. She trembles not because she doubts, but because she truly believes what the angel has said. And so she trembles not because she hesitates, but because she has consented.
From today's sermon at Zion Evangelical-Lutheran Church of Detroit