And this further we hold, that the union took
place through common essences. For every essence is common to the
subsistences contained in it, and there cannot be found a partial and
particular nature, that is to say, essence: for otherwise we
would have to hold that the same subsistences are at once the same and
different in essence, and that the Holy Trinity in respect of the
divinity is at once the same and different in essence. So then
the same nature is to be observed in each of the subsistences, and when
we said that the nature of the word became flesh, as did the blessed
Athanasius and Cyrillus, we mean that the divinity was joined to the
flesh. Hence we cannot say “The nature of the Word
suffered;” for the divinity in it did not suffer, but we say that
the human nature, not by any means, however, meaning Text, ὑπεμφαίνοντες.
Variant, ἐμφαίνομεν. all the subsistences of men, suffered in
Christ, and we confess further that Christ suffered in His human
nature. So that when we speak of the nature of the Word we mean
the Word Himself. And the Word has both the general element of
essence and the particular element of subsistence.