Answer to Eunomius' Second Book
Such is our position; our adversary's, with regard to the precise meaning of this term, is such as can derive no help from any reasonings; he only spits forth at random about it these strangely unmeaning and bombastic expressions, in the framework of his sentences and periods. But the upshot of all he says is this; that there is no difference in the meaning of the most varied names. But we must most certainly, as it seems to me, quote this passage of his word for word, lest we be thought to be calumniously charging him with something that does not belong to him. “True expressions,” he says, “derive their precision from the subject realities which they indicate; different expressions are applied to different realities, the same to the same: and so one or other of these two things must of necessity be held: either that the reality indicated is different (if the expressions are), or else that the indicating expressions are not different.” With these and many other such-like words, he proceeds to effect the object he has before him, excluding from the expression certain relations and affinities, such as species, proportion, part, time, manner: in order that by the withdrawal of all these “Ungeneracy” may become indicative of the substance of God. His process of proof is in the following manner (I will express his idea in my own words). The life, he says, is not a different thing from the substance; no addition may be thought of in connection with a simple being, by dividing our conception of him into a communicating and communicated side; but whatever the life may be, that very thing, he insists, is the substance. Here his philosophy is excellent; no thinking person would gainsay this. But how does he arrive at his contemplated conclusion, when he says, “when we mean the unbeginning, we mean the life, and truth compels us by this last to mean the substance”? The ungenerate, then, according to him is expressive of the very substance of God. We, on the other hand, while we agree that the life of God was not given by another, which is the meaning of “unbeginning,” think that the belief that the idea expressed by the words “not generated” is the substance of God is a madman's only. Who indeed can be so beside himself as to declare the absence of any generation to be the definition of that substance (for as generation is involved in the generate, so is the absence of generation in the ungenerate)? Ungeneracy indicates that which is not in the Father; so how shall we allow the indication of that which is absent to be His substance? Helping himself to that which neither we nor any logical conclusion from the premises allows him, he lays it down that God's Ungeneracy is expressive of God's life. But to make quite plain his delusion upon this subject, let us look at it in the following way; I mean, let us examine whether, by employing the same method by which he, in the case of the Father, has brought the definition of the substance to ungeneracy, we may not equally bring the substance of the Son to ungeneracy.
He says, “The Life that is the same, and thoroughly single, must have one and the same outward expression for it, even though in mere names, and manner, and order it may seem to vary. For true expressions derive their precision from the subject realities which they indicate; different expressions are applied to different realities, the same to the same; and so one or other of these two things must of necessity be held; either that the reality indicated is quite different (if the expressions are), or else that the indicating expressions are not different;” and there is in this case no other subject reality besides the life of the Son, “for one either to rest an idea upon, or to cast a different expression upon.” Is there, I may ask, any unfitness in the words quoted, which would prevent them being rightly spoken or written about the Only-begotten? Is not the Son Himself also a “Life thoroughly single”? Is there not for Him also “one and the same” befitting “expression,” “though in mere names, and manner, and order He may seem to vary”? Must not, for Him also, “one or other of these two things be held” fixed, “either that the reality indicated is quite different, or else that the indicating expressions are not different,” there being no other subject reality, besides his life, “for one either to rest an idea upon, or to cast a different expression upon”? We mix up nothing here with what Eunomius has said about the Father; we have only passed from the same accepted premise to the same conclusion as he did, merely inserting the Son's name instead. If, then, the Son too is a single life, unadulterated, removed from every sort of compositeness or complication, and there is no subject reality besides this life of the Son (for how in that which is simple can the mixture of anything foreign be suspected? What we have to think of along with something else is no longer simple), and if the Father's substance also is a single life, and of this single life, by virtue of its very life and its very singleness, there are no differences, no increase or decrease in quantity or quality in it creating any variation, it needs must be that things thus coinciding in idea should be called by the same appellation also. If, that is, the thing that is detected both in the Father and the Son, I mean the singleness of life, is one, the very idea of singleness excluding, as we have said, any variation, it needs must be that the name befitting the one should be attached to the other also. For as that which reasons, and is mortal, and is capable of thought and knowledge, is called “man” equally in the case of Adam and of Abel, and this name of the nature is not altered either by the fact that Abel passed into existence by generation, or by the fact that Adam did so without generation, so, if the simplicity and incompositeness of the Father's life has ungeneracy for its name, in like manner for the Son's life the same idea will necessarily have to be attached to the same utterance, if, as Eunomius says, “one or other of these two things must of necessity be held; either that the reality indicated is quite different, or else that the indicating expressions are not different.”
But why do we linger over these follies, when we ought rather to put Eunomius' book itself into the hands of the studious, and so, apart from any examination of it, to prove at once to the discerning, not only the blasphemy of his opinion, but also the nervelessness of his style? While in various ways, not going upon our apprehension of it, but following his own fancy, he misinterprets the word Conception, just as in a night-battle nobody can distinguish friend and foe, he does not understand that he is stabbing his own doctrine with the very weapons he thinks he is turning upon us. For the point in which he thinks he is most removed from the church of the orthodox is this; that he attempts to prove that God became Father at some later time, and that the appellation of Fatherhood is later than all those other names which attach to Him; for that He was called Father from that moment in which He purposed in Himself to become, and did become, Father. Well, then, since in this treatise he is for proving that all the names applied to the Divine Nature coincide with each other, and that there is no difference whatever between them, and since one among these applied names is Father (for as God is indestructible and eternal, so also He is Father), we must either sanction, in the case of this term also, the opinion he holds about the rest, and so contravene his former position, seeing that the idea of Fatherhood is found to be involved in any of these other terms (for it is plain that if the meaning of indestructible and Father is exactly the same, He will be believed to be, just as He is always indestructible, so likewise always Father, there being one single signification, he says, in all these names): or else, if he fears thus to testify to the eternal Fatherhood of God, he must perforce abandon his whole argument, and own that each of these names has a meaning peculiar to itself; and thus all this nonsense of his about the Divine names bursts like a bubble, and vanishes like smoke.
Source: Answer to Eunomius' Second Book (New Advent)