How Jesus Christ came to be born
This is how Jesus Christ came to be born. His mother Mary was betrothed to Joseph; but before they came to live together she was found to be with child through the Holy Spirit. Her husband Joseph; being a man of honour and wanting to spare her publicity, decided to divorce her informally. He had made up his mind to do this when the angel of the Lord appeared to him in a dream and said, ‘Joseph son of David, do not be afraid to take Mary home as your wife, because she has conceived what is in her by the Holy Spirit. She will give birth to a son and you must name him Jesus, because he is the one who is to save his people from their sins.’ Now all this took place to fulfil the words spoken by the Lord through the prophet:
The virgin will conceive and give birth to a son
and they will call him Emmanuel,
a name which means ‘God-is-with-us.’
Source: Jerusalem Bible
Catechism of the Catholic Church
496 From the first formulations of her faith, the Church has confessed that Jesus was conceived solely by the power of the Holy Spirit in the womb of the Virgin Mary, affirming also the corporeal aspect of this event: Jesus was conceived “by the Holy Spirit without human seed”. The Fathers see in the virginal conception the sign that it truly was the Son of God who came in a humanity like our own. Thus St. Ignatius of Antioch at the beginning of the second century says:
You are firmly convinced about our Lord, who is truly of the race of David according to the flesh, Son of God according to the will and power of God, truly born of a virgin,. . . he was truly nailed to a tree for us in his flesh under Pontius Pilate. . . he truly suffered, as he is also truly risen.
497 The Gospel accounts understand the virginal conception of Jesus as a divine work that surpasses all human understanding and possibility: “That which is conceived in her is of the Holy Spirit”, said the angel to Joseph about Mary his fiancee. The Church sees here the fulfillment of the divine promise given through the prophet Isaiah: “Behold, a virgin shall conceive and bear a son.”
498 People are sometimes troubled by the silence of St. Mark’s Gospel and the New Testament Epistles about Jesus’ virginal conception. Some might wonder if we were merely dealing with legends or theological constructs not claiming to be history. To this we must respond: Faith in the virginal conception of Jesus met with the lively opposition, mockery or incomprehension of non-believers, Jews and pagans alike; so it could hardly have been motivated by pagan mythology or by some adaptation to the ideas of the age. The meaning of this event is accessible only to faith, which understands in it the “connection of these mysteries with one another” in the totality of Christ’s mysteries, from his Incarnation to his Passover. St. Ignatius of Antioch already bears witness to this connection: “Mary’s virginity and giving birth, and even the Lord’s death escaped the notice of the prince of this world: these three mysteries worthy of proclamation were accomplished in God’s silence.”
For the leader; “upon the eighth.” A psalm of David.
Help, LORD, for no one loyal remains; the faithful have vanished from the human race
Those who tell lies to one another speak with deceiving lips and a double heart.
May the LORD cut off all deceiving lips, and every boastful tongue,
Those who say, “By our tongues we prevail; when our lips speak, who can lord it over us?”
“Because they rob the weak, and the needy groan, I will now arise,” says the LORD; “I will grant safety to whoever longs for it.”
The promises of the LORD are sure, silver refined in a crucible, silver purified seven times.
LORD, protect us always; preserve us from this generation.
On every side the wicked strut; the shameless are extolled by all.
Source: The New American Bible