CATECHISM OF THE CATHOLIC CHURCH
SECOND EDITION

Paragraphs 742–745

742 "Because you are sons, God has sent the Spirit of his Son into our hearts, crying, 'Abba! Father!"' (Gal 4:6).
743 From the beginning to the end of time, whenever God sends his Son, he always sends his Spirit: their mission is conjoined and inseparable.
744 In the fullness of time the Holy Spirit completes in Mary all the preparations for Christ's coming among the People of God. By the action of the Holy Spirit in her, the Father gives the world Emmanuel "God-with-us" (Mt 1:23).
745 The Son of God was consecrated as Christ (Messiah) by the anointing of the Holy Spirit at his Incarnation (cf. Ps 2:6-7).