FOURTH ARTICLE: WHETHER CHRIST AS MAN IS THE ADOPTED SON OF GOD

State of the question. About the end of the eighth century Archbishop Elipandus of Toledo, and Bishop Felix of Urgel, Adoptionists, taught that Christ as man is the adopted son of God. And more probably, whatever Vasquez says, they defended this thesis in the Nestorian sense, namely, by positing two persons in Christ. They were condemned as heretics in the Council of Frankfort (794) under Pope Hadrian I.[1604]

But Durandus and Scotus were unaware of the acts of the Frankfort council, which for a long time remained unknown because of the astuteness of the heretics. These theologians said: The unity of the person being preserved intact, Christ as man is the adopted Son of God, inasmuch as He received habitual grace by which we are adopted sons.

Is this opinion of Scotus and Durandus already condemned by the Council of Frankfort, the acts of which were unknown to these theologians? The answer is that the Council of Frankfort excludes even this opinion, for it says: "Adopted, if indeed this means that Jesus Christ is not the natural Son of God." This council also says: "The unity of person eliminates the insult of adoption." St. Thomas in the counterargument to this article also quotes St. Ambrose as against this opinion.

Theological proof. The argumentative part of this article refutes the adoptive sonship of Christ as follows:

Sonship properly belongs not to the nature, but to the person, and He who is already the natural Son cannot be called the adopted son, because He is not a stranger to His Father according to His nature. Thus a man cannot adopt a boy who is already his son. But Christ is the natural Son of God. Therefore Christ cannot be called the adopted son.

In explanation of this proof, it must be observed that:

1) Adoption cannot apply to the humanity of Christ, both because the humanity is not a person, and only a person can be adopted, and because, on account of the hypostatic union, it already is entitled to the inheritance of God, which is the beatific vision.

2) It must be noted that Christ as man is already in the formal sense the natural Son of God, inasmuch as the Word who subsists in the human nature is the natural Son of God, for by assuming the human nature Christ did not lose His divine natural sonship.

The solution of the objections confirms this answer.

Reply to first objection. If it is said that "carnal humility was adopted by the Word', ; the expression is metaphorical for "was assumed"; for adoption properly belongs only to the person, not to the nature, or to a part of the nature.

Reply to second objection. "Christ, by the grace of union, is the natural Son, whereas a Christian by habitual grace is an adopted son. Habitual grace in Christ does not make one who was not a son to be an adopted son, but is a certain effect of filiation in the soul of Christ."

Adopted sonship is not the formal and primary effect of habitual grace, but only the secondary effect; hence habitual grace can be in the soul without the former. It is present in Christ's soul as a participation of the divine nature rendering Christ more pleasing to God, and it enables Him in a special manner to merit continually by infused charity and the other virtues, of which habitual grace is the source.

Reply to third objection. We may say that Christ according to His human nature is a creature, and is subject to God; but we cannot say that He is the adopted Son of God, because sonship is not said of the nature but only of the person; for we do not say the humanity of Christ is the Son of God.

Corollary. The Blessed Virgin Mary is the first adopted daughter of God.