Against Eunomius

Let us observe, too, what sort of work of the Father it is by which the Father's being, according to him, is to be comprehended. The Son most certainly, he will say, if he says as usual. But this Son of yours, most learned sir, is commensurate in your scheme only with the energy which produced Him, and indicates that alone, while the Object of our search still keeps in the dark, if, as you yourself confess, this energy is only one among the things which 'follow ' the first being. This energy, as you say, extends itself into the work which it produces, but it does not reveal therein even its own nature, but only so much of it as we can get a glimpse of in that work. All the resources of a smith are not set in motion to make a gimlet; the skill of that artisan only operates so far as is adequate to form that tool, though it could fashion a large variety of other tools. Thus the limit of the energy is to be found in the work which it produces. But the question now is not about the amount of the energy, but about the being of that which has put forth the energy. In the same way, if he asserts that he can perceive the nature of the Only-begotten in the Spirit (Whom he styles the work of an energy which 'follows' the Son), his assertion has no foundation; for here again the energy, while it extends itself into its work, does not reveal therein the nature either of itself or of the agent who exerts it.

But let us yield in this; grant him that beings are known in their energies. The First being is known through His work; and this Second being is revealed in the work proceeding from Him. But what, my learned friend, is to show this Third being? No such work of this Third is to be found. If you insist that these beings are perceived by their energies, you must confess that the Spirit's nature is imperceptible; you cannot infer His nature from any energy put forth by Him to carry on the continuity. Show some substantiated work of the Spirit, through which you think you have detected the being of the Spirit, or all your cobweb will collapse at the touch of Reason. If the being is known by the subsequent energy, and substantiated energy of the Spirit there is none, such as you say the Father shows in the Son, and the Son in the Spirit, then the nature of the Spirit must be confessed unknowable and not be apprehended through these; there is no energy conceived of in connection with a substance to show even a side glimpse of it. But if the Spirit eludes apprehension, how by means of that which is itself imperceptible can the more exalted being be perceived? If the Son's work, that is, the Spirit according to them, is unknowable, the Son Himself can never be known; He will be involved in the obscurity of that which gives evidence of Him: and if the being of the Son in this way is hidden, how can the being who is most properly such and most supreme be brought to light by means of the being which is itself hidden; this obscurity of the Spirit is transmitted by retrogression through the Son to the Father; so that in this view, even by our adversaries' confession, the unknowableness of the Fathers being is clearly demonstrated. How, then, can this man, be his eye ever so 'keen to see unsubstantial entities,' discern the nature of the unseen and incomprehensible by means of itself; and how can he command us to grasp the beings by means of their works, and their works again from them?