He further shows that the pretemporal generation of the Son is not the subject of influences drawn from ordinary and carnal generation, but is without beginning and without end, and not according to the fabrications constructed by Eunomius, in ignorance of His power, from the statements of Plato concerning the souland from the sabbath rest of the Hebrews
What he says runs thus:— “As all generation is not protracted to infinity, but ceases on arriving at some end, those who admit the origination of the Son are absolutely obliged to say that He then ceased being generated, and not to look incredulously on the beginning of those things which cease being generated, and therefore also surely begin: for the cessation of generation establishes a beginning of begetting and being begotten: and these facts cannot be disbelieved, on the ground at once of nature itself and of the Divine laws.” Now since he endeavours to establish his point inferentially, laying down his universal proposition according to the scientific method of those who are skilled in such matters, and including in the general premise the proof of the particular, let us first consider his universal, and then proceed to examine the force of his inferences. Is it a reverent proceeding to draw from “all generation” evidence even as to the pre-temporal generation of the Son? And ought we to put forward ordinary nature as our instructor on the being of the Only-begotten? For my own part, I should not have expected any one to reach such a point of madness, that any such idea of the Divine and unsullied generation should enter his fancy. “All generation,” he says, “is not protracted to infinity.” What is it that he understands by “generation”? Is he speaking of fleshly, bodily birth, or of the formation of inanimate objects? The affections involved in bodily generation are well known— affections which no one would think of transferring to the Divine Nature. In order therefore that our discourse may not, by mentioning the works of nature at length, be made to appear redundant, we shall pass such matters by in silence, as I suppose that every sensible man is himself aware of the causes by which generation is protracted, both in regard to its beginning and to its cessation: it would be tedious and at the same time superfluous to express them all minutely, the coming together of those who generate, the formation in the womb of that which is generated, travail, birth, place, time, without which the generation of a body cannot be brought about—things which are all equally alien from the Divine generation of the Only-begotten: for if any one of these things were admitted, the rest will of necessity all enter with it. That the Divine generation, therefore, may be clear of every idea connected with passion, we shall avoid conceiving with regard to it even that extension which is measured by intervals. Now that which begins and ends is surely regarded as being in a kind of extension, and all extension is measured by time, and as time (by which we mark both the end of birth and its beginning) is excluded, it would be vain, in the case of the uninterrupted generation, to entertain the idea of end or beginning, since no idea can be formed to mark either the point at which such generation begins or that at which it ceases. If on the other hand it is the inanimate creation to which he is looking, even in this case, in like manner, place, and time, and matter, and preparation, and power of the artificer, and many like things, concur to bring the product to perfection. And since time assuredly is concurrent with all things that are produced, and since with everything that is created, be it animate or inanimate, there are conceived also bases of construction relative to the product, we can find in these cases evident beginnings and endings of the process of formation. For even the procuring of material is actually the beginning of the fabric, and is a sign of place, and is logically connected with time. All these things fix for the products their beginnings and endings; and no one could say that these things have any participation in the pretemporal generation of the Only-begotten God, so that, by the aid of the things now under consideration, we are able to calculate, with regard to that generation, any beginning or end.
Now that we have so far discussed these matters, let us resume consideration of our adversaries' argument. It says, “As all generation is not protracted to infinity, but ceases on arriving at some end.” Now, since the sense of “generation” has been considered with respect to either meaning—whether he intends by this word to signify the birth of corporeal beings, or the formation of things created (neither of which has anything in common with the unsullied Nature), the premise is shown to have no connection with the subject. For it is not a matter of absolute necessity, as he maintains, that, because all making and generation ceases at some limit, therefore those who accept the generation of the Son should circumscribe it by a double limit, by supposing, as regards it, a beginning and an end. For it is only as being circumscribed in some quantitative way that things can be said either to begin or to cease on arriving at a limit, and the measure expressed by time (having its extension concomitant with the quantity of that which is produced) differentiates the beginning from the end by the interval between them. But how can any one measure or treat as extended that which is without quantity and without extension? What measure can he find for that which has no quantity, or what interval for that which has no extension? Or how can any one define the infinite by “end” and “beginning?” for “beginning” and “end” are names of limits of extension, and, where there is no extension, neither is there any limit. Now the Divine Nature is without extension, and, being without extension, it has no limit; and that which is limitless is infinite, and is spoken of accordingly. Thus it is idle to try to circumscribe the infinite by “beginning” and “ending”— for what is circumscribed cannot be infinite. How comes it, then, that this Platonic Phædrus disconnectedly tacks on to his own doctrine those speculations on the soul which Plato makes in that dialogue? For as Plato there spoke of “cessation of motion,” so this writer too was eager to speak of “cessation of generation,” in order to impose upon those who have no knowledge of these matters, with fine Platonic phrases. “And these facts,” he tells us, “cannot be disbelieved, on the ground at once of nature itself and of the Divine laws.” But nature, from our previous remarks, appears not to be trustworthy for instruction as to the Divine generation—not even if one were to take the universe itself as an illustration of the argument: since through its creation also, as we learn in the cosmogony of Moses, there ran the measure of time, meted out in a certain order and arrangement by stated days and nights, for each of the things that came into being: and this even our adversaries' statement does not admit with regard to the being of the Only-begotten, since it acknowledges that the Lord was before the times of the ages.
Source: Against Eunomius (New Advent)