You run and flee to this human nature which we affirm,
without explaining a reason for accepting your [doctrine of a
human hypostasis] which you care for. For the fact that
[not numbering the human nature in one of the Trinity]
would [lead to] the whole Trinity generally possessing the
human nature, does not need to be proven by either our
arguments or yours. But this last thing which you say, that
the [human nature] is not numbered with the Divine nature,
this is well known, because [the human nature] receives
the number of its natural knowability from its belonging to
the hypostasis of the Son. Thus, whether it is reckoned
along side of the hypostases of the Father and the Spirit
or along side the common nature of the Trinity, it receives the
number of its knowability [from the Son]. But if there is also a
[human] hypostasis as you affirm, then in the same way that
its nature is [united] with the nature of Divinity [in Christ], so
its hypostasis [would] also be counted with the three
hypostases which are in [the Trinity].
[ On whether Christ becomes two Sons when it is said
that Christ has two hypostases.]
Is the God Word born from the Virgin naturally or by grace?
Naturally when as a man, but by grace and by the economy of
union as God. But tell me yourself whether a hypostasis is
born which is not confessed to be the Son?
It is known that every hypostasis which is born is
confessed to be the son of that from which it is born.
Therefore when you confess two hypostases, and it is
clear that you say that there are [separate] births for them,
one from the Father and another from Mary, you are
confessing two sons.
We confess and are zealous for one sonship and
person in these two hypostases.
Then tell me do you say that this one sonship which you
confess is natural to both hypostases or to one alone?
If it is the former, behold two sons and two Christs
equal in nature. But if it is the second, there remains
one of the hypostases which is not called son or begotten.
And again it is asked:
Is a hypostasis born without sonship? and if there is sonship to every
because of this there are two sons.