Proof that the Anomœan teaching tends to Manichæism
We hear our Lord saying. “I and My Father are one,” and we are taught in that utterance the dependence of our Lord on a cause, and yet the absolute identity of the Son's and the Father's nature; we do not let our idea about them be melted down into One Person, but we keep distinct the properties of the Persons, while, on the other hand, not dividing in the Persons the oneness of their substance; and so the supposition of two diverse principles in the category of Cause is avoided, and there is no loophole for the Manichæan heresy to enter. For the created and the uncreate are as diametrically opposed to each other as their names are; and so if the two are to be ranked as First Causes, the mischief of Manichæism will thus under cover be brought into the Church. I say this, because my zeal against our antagonists makes me scrutinize their doctrine very closely. Now I think that none would deny that we were bringing this scrutiny very near the truth, when we said, that if the created be possessed of equal power with the uncreate, there will be some sort of antagonism between these things of diverse nature, and as long as neither of them fails in power, the two will be brought into a certain state of mutual discord for we must perforce allow that will corresponds with, and is intimately joined to nature; and that if two things are unlike in nature, they will be so also in will. But when power is adequate in both, neither will flag in the gratification of its wish; and if the power of each is thus equal to its wish, the primacy will become a doubtful point with the two: and it will end in a drawn battle from the inexhaustibleness of their powers. Thus will the Manichæan heresy creep in, two opposite principles appearing with counter claims in the category of Cause, parted and opposed by reason of difference both in nature and in will. They will find, therefore, that assertion of diminution (in the Divine being) is the beginning of Manichæism; for their teaching organizes a discord within that being, which comes to two leading principles, as our account of it has shown; namely the created and the uncreated.
But perhaps most will blame this as too strong a reductio ad absurdum, and will wish that we had not put it down at all along with our other objections. Be it so; we will not contradict them. It was not our impulse, but our adversaries themselves, that forced us to carry our argument into such minuteness of results. But if it is not right to argue thus, it was more fitting still that our opponents' teaching, which gave occasion to such a refutation, should never have been heard. There is only one way of suppressing the answer to bad teaching, and that is, to take away the subject-matter to which a reply has to be made. But what would give me most pleasure would be to advise those, who are thus disposed, to divest themselves a little of the spirit of rivalry, and not be such exceedingly zealous combatants on behalf of the private opinions with which they have become possessed, and convinced that the race is for their (spiritual) life, to attend to its interests only, and to yield the victory to Truth. If, then, one were to cease from this ambitious strife, and look straight into the actual question before us, he would very soon discover the flagrant absurdity of this teaching.
For let us assume as granted what the system of our opponents demands, that the having no generation is Being, and in like manner again that generation is admitted into Being. If, then, one were to follow out carefully these statements in all their meaning, even this way the Manichæan heresy will be reconstructed seeing that the Manichees are wont to take as an axiom the oppositions of good and bad, light and darkness, and all such naturally antagonistic things. I think that any who will not be satisfied with a superficial view of the matter will be convinced that I say true. Let us look at it thus. Every subject has certain inherent characteristics, by means of which the specialty of that underlying nature is known. This is so, whether we are investigating the animal kingdom, or any other. The tree and the animal are not known by the same marks; nor do the characteristics of man extend in the animal kingdom to the brutes; nor, again, do the same symptoms indicate life and death; in every case, without exception, as we have said, the distinction of subjects resists any effort to confuse them and run one into another; the marks upon each thing which we observe cannot be communicated so as to destroy that distinction. Let us follow this out in examining our opponents' position. They say that the state of having no generation is Being; and they likewise make the having generation Being. But just as a man and a stone have not the same marks (in defining the essence of the animate and that of the inanimate you would not give the same account of each), so they must certainly grant that one who is non-generated is to be known by different signs to the generated. Let us then survey those peculiar qualities of the non-generated Deity, which the Holy Scriptures teach us can be mentioned and thought of, without doing Him an irreverence.
What are they? I think no Christian is ignorant that He is good, kind, holy, just and hallowed, unseen and immortal, incapable of decay and change and alteration, powerful, wise, beneficent, Master, Judge, and everything like that. Why lengthen our discussion by lingering on acknowledged facts? If, then, we find these qualities in the ungenerate nature, and the state of having been generated is contrary in its very conception to the state of having not been generated, those who define these two states to be each of them Being, must perforce concede, that the characteristic marks of the generated being, following this opposition existing between the generated and non-generated, must be contrary to the marks observable in the non-generated being; for if they were to declare the marks to be the same, this sameness would destroy the difference between the two beings who are the subject of these observations. Differing things must be regarded as possessing differing marks; like things are to be known by like signs. If, then, these men testify to the same marks in the Only-begotten, they can conceive of no difference whatever in the subject of the marks. But if they persist in their blasphemous position, and maintain in asserting the difference of the generated and the non-generated the variation of the natures, it is readily seen what must result: viz., that, as in following out the opposition of the names, the nature of the things which those names indicate must be considered to be in a state of contrariety to itself, there is every necessity that the qualities observed in each should be drawn out opposite each other; so that those qualities should be applied to the Son which are the reverse of those predicated of the Father, viz., of divinity, holiness, goodness, imperishability, eternity, and of every other quality that represents God to the devout mind; in fact, every negation of these, every conception that ranks opposite to the good, must be considered as belonging to the generated nature.
To ensure clearness, we must dwell upon this point. As the peculiar phænomena of heat and cold— which are themselves by nature opposed to each other (let us take fire and ice as examples of each), each being that which the other is not— are at variance with each other, cooling being the peculiarity of ice, heating of fire; so if in accordance with the antithesis expressed by the names, the nature revealed by those names is parted asunder, it is not to be admitted that the faculties attending these natural “subcontraries” are like each other, any more than cooling can belong to fire, or burning to ice. If, then, goodness is inseparable from the idea of the non-generated nature, and that nature is parted on the ground of being, as they declare, from the generated nature, the properties of the former will be parted as well from those of the latter: so that if the good is found in the first, the quality set against the good is to be perceived in the last. Thus, thanks to our clever systematizers, Manes lives again with his parallel line of evil in array over against the good, and his theory of opposite powers residing in opposite natures.
Source: Against Eunomius (New Advent)