As I said last time, it was Vincent and Christology that really got me when reading the Commonitorium. From my angle, this is because I study Leo the Great and the transmission of his letters. Leo was himself a writer on Christology, and it was Christological controversy that both gave him the appellation ‘the Great’ and ensured the survival of so many of his letters.
For Vincent, Christology is important because it’s what’s just been being discussed at the Council of Ephesus in 431, where Nestorius was anathematised as a heretic by Cyril of Alexandria’s council, and John of Antioch’s council went without recognition or approval of the emperor. All sorts of politicking went on to gain approval, but from the monk’s eye view, what mattered was what was true.
That, essentially, is the point of the Commonitorium. Figure out the truth.
While truth-seeking method is Vincent’s main aim, he does provide some of this truth himself.
Vincent is opposed to Nestorianism, which he takes to be the belief that Christ was two persons, even if Nestorius denies believing that:
But if any one supposes that in his writings he speaks of one Christ, and preaches one Person of Christ, let him not lightly credit it. For either this is a crafty device, that by means of good he may the more easily persuade evil, according to that of the apostle, That which is good was made death to me, (Romans 7:13) — either, I say, he craftily affects in some places in his writings to believe one Christ and one Person of Christ, or else he says that after the Virgin had brought forth, the two Persons were united into one Christ, though at the time of her conception or parturition, and for some short time afterwards, there were two Christs; so that forsooth, though Christ was born at first an ordinary man and nothing more, and not as yet associated in unity of Person with the Word of God, yet afterwards the Person of the Word assuming descended upon Him; and though now the Person assumed remains in the glory of God, yet once there would seem to have been no difference between Him and all other men. (ch. 35)
Vincent proceeds to describe what the catholic faith in the Trinity and incarnation is. He does this in a way that, to me, is wholly consistent with the Latin tradition, arguing that, ‘In God there is one substance, but three Persons; in Christ two substances, but one Person.’ (ch. 37) He is using substantia here not unlike the way natura will be used as terms become more precise. By and large, he is on the trajectory that ends up at Leo (whether we read the history of theology teologically or not, that is where Latin theology goes):
Thus, then, in one and the same Christ there are two substances, one divine, the other human; one of (ex) God the Father, the other of (ex) the Virgin Mother; one co-eternal with and co-equal with the Father, the other temporal and inferior to the Father; one consubstantial with his Father, the other, consubstantial with his Mother, but one and the same Christ in both substances. There is not, therefore, one Christ God, the other man, not one uncreated, the other created; not one impassible, the other passible; not one equal to the Father, the other inferior to the Father; not one of his Father (ex), the other of his Mother (ex), but one and the same Christ, God and man, the same uncreated and created, the same unchangeable and incapable of suffering, the same acquainted by experience with both change and suffering, the same equal to the Father and inferior to the Father, the same begotten of the Father before time, (before the world), the same born of his mother in time (in the world), perfect God, perfect Man. In God supreme divinity, in man perfect humanity. Perfect humanity, I say, forasmuch as it has both soul and flesh; the flesh, very flesh; our flesh, his mother’s flesh; the soul, intellectual, endowed with mind and reason. (ch. 37)
This is, if you ask me, the thoughtworld of Leo’s Tome, even if expressed differently.
Moreover, I would argue that Vincent is also on the trajectory of the hypostatic union *edit AND communicatio idiomatum* — again, not that that’s a necessary end-point of thought, but he does seem to be leading there in chh. 39 and 40. He writes:
In consequence of which unity of Person, boththose attributes which are proper to God are ascribed to man, and those which are proper to the flesh to God, indifferently and promiscuously. (ch. 40)
He also writes:
Blessed, I say, be the Church, which declares this unity of Person to be so real and effectual, that because of it, in a marvellous and ineffable mystery, she ascribes divine attributes to man, and human to God; because of it, on the one hand, she does not deny that Man, as God, came down from heaven, on the other, she believes that God, as Man, was created, suffered, and was crucified on earth; because of it, finally, she confesses Man the Son of God, and God the Son of the Virgin. (ch. 41)
All of this is interesting to see going on in Southern Gaul in the 430s. Eastern debates are live, and the West has its way of articulating theology that will gain in nuance but, at least in these two questions, little in substance as the years go on. Of course, easterners as a result criticise us for allegedly just parrotting Augustine and Leo for 1500 years. And maybe that’s why we all need each other.