“ Mary, who had been troubled by the sight of the angel, now remains calm before the succession of such miracles as the pregnancy of the barren woman, motherhood in a virgin, speech from a mute, the adoration of the Magi, the expectation of Simeon, and the witness of the stars. And, the Gospel says,
Ambrose of Milan, De virginibus 2, 6-16; PL 16, 220-22
“She kept all these things in her heart” (Lk 2:19). Even though she was the Mother of the Lord, she wanted to learn His precepts. She, who had given birth to God, desired to know God still better.
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References:
Gambero, L., 1999. Mary and the Fathers of the Church 1st ed. Translated by Buffer, T., San Francisco: Ignatius Press.