He then shows, from the instance of Adam and Abel, and other examples, the absence of alienation of essence in the case of the generate and ungenerate
Now seeing that Eunomius' conflict with himself has been made manifest, where he has been shown to contradict himself, at one time saying, “He ought to be called 'Son,' according to nature, because He is begotten,” at another that, because He is created, He is no more called “Son,” but a “product,” I think it right that the careful and attentive reader, as it is not possible, when two statements are mutually at variance, that the truth should be found equally in both, should reject of the two that which is impious and blasphemous— that, I mean, with regard to the “creature” and the “product,” and should assent to that only which is of orthodox tendency, which confesses that the appellation of “Son” naturally attaches to the Only-begotten God: so that the word of truth would seem to be recommended even by the voice of its enemies.
Source: Against Eunomius (New Advent)