On the Holy Trinity

¹¹ But lest I should seem to favor ourselves [the Latins], let us make this further inquiry. Although they [the Greeks] also, if they pleased, as they call three substances three hypostases, so might call three persons three “prosopa,” yet they preferred that word which, perhaps, was more in accordance with the usage of their language. For the case is the same with the word persons also; for to God it is not one thing to be, another to be a person, but it is absolutely the same thing.

For if to be is said in respect to Himself, but person relatively; in this way we should say three persons, the Father, Son, and Holy Spirit; just as we speak of three friends, or three relations, or three neighbors, in that they are so mutually, not that each one of them is so in respect to himself. Wherefore any one of these is the friend of the other two, or the relation, or the neighbor, because these names have a relative signification. What then? Are we to call the Father the person of the Son and of the Holy Spirit, or the Son the person of the Father and of the Holy Spirit, or the Holy Spirit the person of the Father and of the Son?

But neither is the word person commonly so used in any case; nor in this Trinity, when we speak of the person of the Father, do we mean anything else than the substance of the Father. Wherefore, as the substance of the Father is the Father Himself, not as He is the Father, but as He is, so also the person of the Father is not anything else than the Father Himself; for He is called a person in respect to Himself, not in respect to the Son, or the Holy Spirit: just as He is called in respect to Himself both God and great, and good, and just, and anything else of the kind; and just as to Him to be is the same as to be God, or as to be great, or as to be good, so it is the same thing to Him to be, as to be a person.

Why, therefore, do we not call these three together one person, as one essence and one God, but say three persons, while we do not say three Gods or three essences; unless it be because we wish some one word to serve for that meaning whereby the Trinity is understood, that we might not be altogether silent, when asked, what three, while we confessed that they are three? For if essence is the genus, and substance or person the species, as some think, then I must omit what I just now said, that they ought to be called three essences, as they are called three substances or persons; as three horses are called three horses, and the same are called three animals, since horse is the species, animal the genus.

For in this case the species is not spoken of in the plural, and the genus in the singular, as if we were to say that three horses were one animal; but as they are three horses by the special name, so they are three animals by the generic one. But if they say that the name of substance or person does not signify species, but something singular and individual; so that any one is not so called a substance or person as he is called a man, for man is common to all men, but in the same manner as he is called this or that man, as Abraham, as Isaac, as Jacob, or anyone else who, if present, could be pointed out with the finger: so will the same reason reach these too.

For as Abraham, Isaac, and Jacob, are called three individuals, so are they called three men, and three souls. Why then are both the Father and the Son and the Holy Spirit, if we are to reason about them also according to genus and species and individual, not so called three essences, as they are called three substances or persons? But this, as I said, I pass over: but I do affirm, that if essence is a genus, then a single essence has no species; just as, because animal is a genus, a single animal has no species.

Therefore the Father, Son, and Holy Spirit are not three species of one essence. But if essence is a species, as man is a species, but those are three which we call substances or persons, then they have the same species in common, in such way as Abraham, Isaac, and Jacob have in common the species which is called man; not as man is subdivided into Abraham, Isaac, and Jacob, so can one man also be subdivided into several single men; for this is altogether impossible, since one man is already a single man.

Why then is one essence subdivided into three substances or persons? For if essence is a species, as man is, then one essence is as one man is: or do we, as we say that any three human beings of the same sex, of the same constitution of body, of the same mind, are one nature,— for they are three human beings, but one nature,— so also say in the Trinity three substances one essence, or three persons one substance or essence? But this is somehow a parallel case, since the ancients also who spoke Latin, before they had these terms, which have not long come into use, that is, essence or substance, used for them to say nature.

We do not therefore use these terms according to genus or species, but as if according to a matter that is common and the same. Just as if three statues were made of the same gold, we should say three statues one gold, yet should neither call the gold genus, and the statues species; nor the gold species, and the statues individuals. For no species goes beyond its own individuals, so as to comprehend anything external to them. For when I define what man is, which is a specific name, every several man that exists is contained in the same individual definition, neither does anything belong to it which is not a man.

But when I define gold, not statues alone, if they be gold, but rings also, and anything else that is made of gold, will belong to gold; and even if nothing were made of it, it would still be called gold; since, even if there were no gold statues, there will not therefore be no statues at all. Likewise no species goes beyond the definition of its genus. For when I define animal, since horse is a species of this genus, every horse is an animal; but every statue is not gold. So, although in the case of three golden statues we should rightly say three statues, one gold; yet we do not so say it, as to understand gold to be the genus, and the statues to be species.

Therefore neither do we so call the Trinity three persons or substances, one essence and one God, as though three somethings subsisted out of one matter [leaving a remainder, i. e.]; although whatever that is, it is unfolded in these three. For there is nothing else of that essence besides the Trinity. Yet we say three persons of the same essence, or three persons one essence; but we do not say three persons out of the same essence, as though therein essence were one thing, and person another, as we can say three statues out of the same gold; for there it is one thing to be gold, another to be statues.

And when we say three men one nature, or three men of the same nature, they also can be called three men out of the same nature, since out of the same nature there can be also three other such men. But in that essence of the Trinity, in no way can any other person whatever exist out of the same essence. Further, in these things, one man is not as much as three men together; and two men are something more than one man: and in equal statues, three together amount to more of gold than each singly, and one amounts to less of gold than two.

But in God it is not so; for the Father, the Son, and the Holy Spirit together is not a greater essence than the Father alone or the Son alone; but these three substances or persons, if they must be so called, together are equal to each singly: which the natural man does not comprehend. For he cannot think except under the conditions of bulk and space, either small or great, since phantasms or as it were images of bodies flit about in his mind.