3. In these circumstances, "her husband Joseph, being a just man and unwilling to put her to shame, resolved to send her away quietly" (Mt 1:19). He did not know how to deal with Mary's "astonishing" motherhood. He certainly sought an answer to this unsettling question, but above all he sought a way out of what was for him a difficult situation. "But as he considered this, behold, an angel of the Lord appeared to him in a dream, saying, 'Joseph, son of David, do not fear to take Mary your wife, for that which is conceived in her is of the Holy Spirit; she will bear a son, and you shall call his name Jesus, for he will save his people from their sins'" (Mt 1:20-21).

There is a strict parallel between the "annunciation" in Matthew's text and the one in Luke. The divine messenger introduces Joseph to the mystery of Mary's motherhood. While remaining a virgin, she who by law is his "spouse" has become a mother through the power of the Holy Spirit. And when the Son in Mary's womb comes into the world, he must receive the name Jesus. This was a name known among the Israelites and sometimes given to their sons. In this case, however, it is the Son who, in accordance with the divine promise, will bring to perfect fulfillment the meaning of the name Jesus-Yehos ua'-which means "God saves."

Joseph is visited by the messenger as "Mary's spouse," as the one who in due time must give this name to the Son to be born of the Virgin of Nazareth who is married to him. It is to Joseph, then, that the messenger turns, entrusting to him the responsibilities of an earthly father with regard to Mary's Son.

"When Joseph woke from sleep, he did as the angel of the Lord commanded him and took Mary as his wife" (cf. Mt 1:24). He took her in all the mystery of her motherhood. He took her together with the Son who had come into the world by the power of the Holy Spirit. In this way he showed a readiness of will like Mary's with regard to what God asked of him through the angel.