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.
12. And until he be purged from this uncleanness, let him believe in the Father, Son, and Holy Spirit, one God, alone, great, omnipotent, good, just, merciful, Creator of all things visible and invisible, and whatsoever can be worthily and truly said of Him in proportion to human capacity. And when he is told that the Father only is God, let him not separate from Him the Son or the Holy Spirit; for together with Him He is the only God, together with whom also He is one God; because, when we are told that the Son also is the only God, we must needs take it without any separation of the Father or the Holy Spirit. And let him so say one essence, as not to think one to be either greater or better than, or in any respect differing from, another. Yet not that the Father Himself is both Son and Holy Spirit, or whatever else each is singly called in relation to either of the others; as Word, which is not said except of the Son, or Gift, which is not said except of the Holy Spirit. And on this account also they admit the plural number, as it is written in the Gospel, |I and my Father are one.| He has both said |one,| and |we are one,| according to essence, because they are the same God; |we are,| according to relation, because the one is Father, the other is Son. Sometimes also the unity of the essence is left unexpressed, and the relatives alone are mentioned in the plural number: |My Father and I will come unto him, and make our abode with him.| We will come, and we will make our abode, is the plural number, since it was said before, |I and my Father,| that is, the Son and the Father, which terms are used relatively to one another. Sometimes the meaning is altogether latent, as in Genesis: |Let us make man after our image and likeness.| Both let us make and our is said in the plural, and ought not to be received except as of relatives. For it was not that gods might make, or make after the image and likeness of gods; but that the Father, and Son, and Holy Spirit might make after the image of the Father, and Son, and Holy Spirit, that man might subsist as the image of God. And God is the Trinity. But because that image of God was not made altogether equal to Him, as being not born of Him, but created by Him; in order to signify this, he is in such way the image as that he is |after the image,| that is, he is not made equal by parity, but approaches to Him by a sort of likeness. For approach to God is not by intervals of place, but by likeness, and withdrawal from Him is by unlikeness. For there are some who draw this distinction, that they will have the Son to be the image, but man not to be the image, but |after the image.| But the apostle refutes them, saying, |For a man indeed ought not to cover his head, forasmuch as he is the image and glory of God.| He did not say after the image, but the image. And this image, since it is elsewhere spoken of as after the image, is not as if it were said relatively to the Son, who is the image equal to the Father; otherwise he would not say after our image. For how our, when the Son is the image of the Father alone? But man is said to be |after the image,| on account, as we have said, of the inequality of the likeness; and therefore after our image, that man might be the image of the Trinity; not equal to the Trinity as the Son is equal to the Father, but approaching to it, as has been said, by a certain likeness; just as nearness may in a sense be signified in things distant from each other, not in respect of place, but of a sort of imitation. For it is also said, |Be ye transformed by the renewing of your mind;| to whom he likewise says, |Be ye therefore imitators of God as dear children.| For it is said to the new man, |which is renewed to the knowledge of God, after the image of Him that created him.| Or if we choose to admit the plural number, in order to meet the needs of argument, even putting aside relative terms, that so we may answer in one term when it is asked what three, and say three substances or three persons; then let no one think of any bulk or interval, or of any distance of howsoever little unlikeness, so that in the Trinity any should be understood to be even a little less than another, in whatsoever way one thing can be less than another: in order that there may be neither a confusion of persons, nor such a distinction as that there should be any inequality. And if this cannot be grasped by the understanding, let it be held by faith, until He shall dawn in the heart who says by the prophet, |If ye will not believe, surely ye shall not understand.|