442 'But when the time had fully come, God sent forth his Son, born of a woman, born under the law, to redeem those who were under the law, so that we might receive adoption as sons.'1 This is ‘the gospel of Jesus Christ, the Son of God’:'2 God has visited his people. He has fulfilled the promise he made to Abraham and his descendants. He acted far beyond all expectation - he has sent his own ‘beloved Son’.3
460 The Word became flesh to make us " partakers of the divine nature ":78 "For this is why the Word became man, and the Son of God became the Son of man: so that man, by entering into communion with the Word and thus receiving divine sonship, might become a son of God."79 "For the Son of God became man so that we might become God."80 "The only-begotten Son of God, wanting to make us sharers in his divinity, assumed our nature, so that he, made man, might make men gods."81
1 Gal 4:4-5.
2 Mk 1:1.
3 Mk 1:11; cf. Lk 1:5,68.
78 2 Pt 1:4.
79 St. Irenaeus, Adv. haeres. 3, 19, 1: PG 7/1, 939.
80 St. Athanasius, De inc. 54, 3: PG 25, 192B.
81 St. Thomas Aquinas, Opusc . 57, 1-4.