At the time appointed by God, the only Son of the Father, the eternal

Word, that is, the Word and substantial Image of the Father, became incarnate; without losing his divine nature he has assumed human nature.

480 Jesus Christ is true God and true man, in the unity of his divine person; f or this reason he is the one and only mediator between God and men.

481 Jesus Christ possesses two natures, one divine and the other human, not confused, but united in the one person of God’s Son.

482 Christ, being true God and true man, has a human intellect and will, perfectly attuned and subject to his divine intellect and divine will, which he has in common with the Father and the Holy Spirit.

483 The Incarnation is therefore the mystery of the wonderful union of the divine and human natures in the one person of the Word.

Paragraph 2. ‘Conceived by the Power of the Holy Spirit and Born of the Virgin Mary’

I. Conceived by the Power of the Holy Spirit... 484 The Annunciation to Mary inaugurates ‘the fullness of time’,”9 the time of the fulfilment of God’s promises and preparations. Mary was invited to conceive him in whom the ‘whole


fullness of deity’ would dwell ‘bodily’.’20 The divine response to

her question, ‘How can this be, since I know not man?’, was given


by the power of the Spirit: ‘The Holy Spirit will come upon



485 The mission of the Holy Spirit is always conjoined and


ordered to that of the Son.’22 The Holy Spirit, ‘the Lord, the giver

of Life’, is sent to sanctify the womb of the Virgin Mary and divinely fecundate it, causing her to conceive the eternal Son of the Father in a humanity drawn from her own. 486 The Father’s only Son, conceived as man in the womb of the Virgin Mary, is ‘Christ’, that is to say, anointed by the Holy Spirit,


from the beginning of his human existence, though the mani

festation of this fact takes place only progressively: to the shepherds, to the magi, to John the Baptist, to the disciples.’23 Thus the