CCC 496 – 500 Mary’s virginity
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 (Mt 1 18-25; Lk 1:26-38): “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.” (Isa 7:14)
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.”
Mary – “ever-virgin”
499 The deepening of faith in the virginal motherhood led the Church to confess Mary’s real and perpetual virginity even in the act of giving birth to the Son of God made man. In fact, Christ’s birth “did not diminish his mother’s virginal integrity but sanctified it.” And so the liturgy of the Church celebrates Mary as Aeiparthenos, the “Ever-virgin”.
500 Against this doctrine the objection is sometimes raised that the Bible mentions brothers and sisters of Jesus. The Church has always understood these passages as not referring to other children of the Virgin Mary. In fact James and Joseph, “brothers of Jesus”, are the sons of another Mary, a disciple of Christ, whom St. Matthew significantly calls “the other Mary”. (Mt 13:55; 28:1; cf. Mt 27:56). They are close relations of Jesus, according to an Old Testament expression. (Gen 13:8; 14:16; 29:15)
Mary conceived Jesus in her womb as a Virgin. She conceived Jesus by the power of the holy spirit and she remained a virgin all through her life. And Jesus had brothers and sisters? How is that earthly possible?
Christ is the son of God and he has no earthly Father but only the heavenly Father, which is God. Mary’s ongoing perpetual virginity after Christ’s birth was her mission of giving birth to Christ, who was to come into the world and save us from our sins. Joseph, on the other hand, was her husband, who was required to regard Mary’s vow of virginity with the utmost respect. Catholics believe that Mary was a virgin all through her entire life but in the Bible, we see several occasions where it talks about the brothers and sisters of the Lord who were there with His mother. It was not specified and it does not necessarily mean actual siblings. The Church understood and never really referred to Jesus’s ‘brothers and sisters’ as the ‘other children’ of Mary.