ishly wrote." But the other opinion falls into the
error of Nestorius by maintaining an accidental union. For there is
no difference in saying that the Word of God is united to the Man
Christ by indwelling, as in His temple (as Nestorius said), or by
putting on man, as a garment, which is the third opinion; rather it
says something worse than Nestorius--to wit, that the soul and body
are not united.

Now the Catholic faith, holding the mean between the aforesaid
positions, does not affirm that the union of God and man took place
in the essence or nature, nor yet in something accidental, but
midway, in a subsistence or hypostasis. Hence in the fifth Council
(Constantinople II, coll. viii, can. 5) we read: "Since the unity may
be understood in many ways, those who follow the impiety of
Apollinaris and Eutyches, professing the destruction of what came
together" (i.e. destroying both natures), "confess a union by
mingling; but the followers of Theodore and Nestorius, maintaining
division, introduce a union of purpose. But the Holy Church of God,
rejecting the impiety of both these treasons, confesses a union of
the Word of God with flesh, by composition, which is in subsistence."
Therefore it is plain that the second of the three opinions,
mentioned by the Master (Sent. iii, D, 6), which holds one hypostasis
of God and man, is not to be called an opinion, but an article of
Catholic faith. So likewise the first opinion which holds two
hypostases, and the third which holds an accidental union, are not to
be styled opinions, but heresies condemned by the Church in Councils.

Reply Obj. 1: As Damascene says (De Fide Orth. iii, 26): "Examples
need not be wholly and at all points similar, for what is wholly
similar is the same, and not an example, and especially in Divine
things, for it is impossible to find a wholly similar example in the
Theology," i.e. in the Godhead of Persons, "and in the Dispensation,"
i.e. the mystery of the Incarnation. Hence the human nature in Christ
is likened to a habit, i.e. a garment, not indeed in regard to
accidental union, but inasmuch as the Word is seen by the human
nature, as a man by his garment, and also inasmuch as the garment is
changed, for it is shaped according to the figure of him who puts it
on, and yet he is not changed from his form on account of the
garment. So likewise the human nature assumed by the Word of God is
ennobled, but the Word of God is not changed, as Augustine says