87. In what way is Jesus Christ true God and true man?

87. In what way is Jesus Christ true God and true man?

(Comp 87) Jesus is inseparably true God and true man in the unity of his divine Person. As the Son of God, who is “begotten, not made, consubstantial with the Father,” he was made true man, our brother, without ceasing to be God, our Lord.

“In Brief”

(CCC 464) The unique and altogether singular event of the Incarnation of the Son of God does not mean that Jesus Christ is part God and part man, nor does it imply that he is the result of a confused mixture of the divine and the human. He became truly man while remaining truly God. Jesus Christ is true God and true man. During the first centuries, the Church had to defend and clarify this truth of faith against the heresies that falsified it.

To deepen and explain

(CCC 465) The first heresies denied not so much Christ's divinity as his true humanity (Gnostic Docetism). From apostolic times the Christian faith has insisted on the true incarnation of God's Son "come in the flesh". (Cf. 1 Jn 4:2-3; 2 Jn 7). But already in the third century, the Church in a council at Antioch had to affirm against Paul of Samosata that Jesus Christ is Son of God by nature and not by adoption. The first ecumenical council of Nicaea in 325 confessed in its Creed that the Son of God is "begotten, not made, of the same substance (homoousios) as the Father", and condemned Arius, who had affirmed that the Son of God "came to be from things that were not" and that he was "from another substance" than that of the Father. (Council of Nicaea I (325): DS 130, 126). (CCC 466) The Nestorian heresy regarded Christ as a human person joined to the divine person of God's Son. Opposing this heresy, St. Cyril of Alexandria and the third ecumenical council, at Ephesus in 431, confessed "that the Word, uniting to himself in his person the flesh animated by a rational soul, became man" (Council of Ephesus (431): DS 250). Christ's humanity has no other subject than the divine person of the Son of God, who assumed it and made it his own, from his conception. For this reason the Council of Ephesus proclaimed in 431 that Mary truly became the Mother of God by the human conception of the Son of God in her womb: "Mother of God, not that the nature of the Word or his divinity received the beginning of its existence from the holy Virgin, but that, since the holy body, animated by a rational soul, which the Word of God united to himself according to the hypostasis, was born from her, the Word is said to be born according to the flesh" (Council of Ephesus: DS 251).

On reflection

(CCC 469) The Church thus confesses that Jesus is inseparably true God and true man. He is truly the Son of God who, without ceasing to be God and Lord, became a man and our brother: "What he was, he remained and what he was not, he assumed", sings the Roman Liturgy (LH, 1 January, antiphon for Morning Prayer; cf. St. Leo the Great, Sermo in nat. Dom. 1, 2; PL 54, 191-192) and the liturgy of St. John Chrysostom proclaims and sings: "O only-begotten Son and Word of God, immortal being, you who deigned for our salvation to become incarnate of the holy Mother of God and ever-virgin Mary, you who without change became man and were crucified, O Christ our God, you who by your death have crushed death, you who are one of the Holy Trinity, glorified with the Father and the Holy Spirit, save us!" (Liturgy of St. John Chrysostom, Troparion “O monogenes”).

(Next question: What does the Council of Chalcedon (in the year 451) teach in this regard?)