Proof that the Anomœan teaching tends to Manichæism
Indeed, if we are to speak the truth boldly, without any reserve, Manes, who for having been the first, they say, to venture to entertain the Manichæan view, gave his name to that heresy, may fairly be considered the less offensive of the two. I say this, just as if one had to choose between a viper and an asp for the most affection towards man; still, if we consider, there is some difference between brutes. Does not a comparison of doctrines show that those older heretics are less intolerable than these? Manes thought he was pleading on the side of the Origin of Good, when he represented that Evil could derive thence none of its causes; so he linked the chain of things which are on the list of the bad to a separate Principle, in his character of the Almighty's champion, and in his pious aversion to put the blame of any unjustifiable aberrations upon that Source of Good; not perceiving, with his narrow understanding, that it is impossible even to conceive of God as the fashioner of evil, or on the other hand, of any other First Principle besides Him. There might be a long discussion on this point, but it is beside our present purpose. We mentioned Manes' statements only in order to show, that he at all events thought it his duty to separate evil from anything to do with God. But the blasphemous error with regard to the Son, which these men systematize, is much more terrible. Like the others, they explain the existence of evil by a contrariety in respect of Being; but when they declare, besides this, that the God of the universe is actually the Maker of this alien production, and say that this “generation” formed by Him into a substance possesses a nature foreign to that of its Maker, they exhibit therein more of impiety than the aforesaid sect; for they not only give a personal existence to that which in its nature is opposed to good, but they say that a Good Deity is the Cause of another Deity who in nature diverges from His; and they all but openly exclaim in their teaching, that there is in existence something opposite to the nature of the good, deriving its personality from the good itself. For when we know the Father's substance to be good, and therefore find that the Son's substance, owing to its being unlike the Father's in its nature (which is the tenet of this heresy), is among the contrary predicables, what is thereby proved? Why, not only that the opposite to the good subsists, but that this contrary comes from the good itself. I declare this to be more horrible even than the irrationality of the Manichees.
But if they repudiate this blasphemy from their system, though it is the logical carrying out of their teaching, and if they say that the Only-begotten has inherited the excellences of the Father, not as being really His Son, but— so does it please these misbelievers— as receiving His personality by an act of creation, let us look into this too, and see whether such an idea can be reasonably entertained. If, then, it were granted that it is as they think, viz., that the Lord of all things has not inherited as being a true Son, but that He rules a kindred of created things, being Himself made and created, how will the rest of creation accept this rule and not rise in revolt, being thus thrust down from kinship to subjection and condemned, though not a whit behind Him in natural prerogative (both being created), to serve and bend beneath a kinsman after all. That were like a usurpation, viz. not to assign the command to a superiority of Being, but to divide a creation that retains by right of nature equal privileges into slaves and a ruling power, one part in command, the other in subjection; as if, as the result of an arbitrary distribution, these same privileges had been piled at random on one who after that distribution got preferred to his equals. Even man did not share his honour with the brutes, before he received his dominion over them; his prerogative of reason gave him the title to command; he was set over them, because of a variance of his nature in the direction of superiority. And human governments experience such quickly-repeated revolutions for this very reason, that it is impracticable that those to whom nature has given equal rights should be excluded from power, but her impulse is instinct in all to make themselves equal with the dominant party, when all are of the same blood.
How, too, will it be true that “all things were made by Him,” if it is true that the Son Himself is one of the things made? Either He must have made Himself, for that text to be true, and so this unreasonableness which they have devised to harm our Faith will recoil with all its force upon themselves; or else, if this is absurdly unnatural, that affirmation that the whole creation was made by Him will be proved to have no ground to stand on. The withdrawal of one makes “all” a false statement. So that, from this definition of the Son as a created being, one of two vicious and absurd alternatives is inevitable; either that He is not the Author of all created things, seeing that He, who, they insist, is one of those works, must be withdrawn from the “all;” or else, that He is exhibited as the maker of Himself, seeing that the preaching that 'without Him was not anything (made) that was made' is not a lie. So much for their teaching.
Source: Against Eunomius (New Advent)