Then he ends the book with an exposition of the Divine and Human names of the Only-Begotten, and a discussion of the terms generate and ungenerate
But we must bring back our enquiry once more to the book. It does not become the same persons “not to refuse” (for I will use their own words) “to call Him that is generated a 'product of generation,' since both the generated essence itself and the appellation of Son make such a relation of words appropriate,” and again to change the names which naturally belong to Him into metaphorical interpretations: so that one of two things has befallen them—either their first attack has failed, and it is in vain that they fly to “natural order” to establish the necessity of calling Him that is generated a “product of generation”; or, if this argument holds good, they will find their second argument brought to nought by what they have already established.
For the person who is called a “product of generation” because He is generated, cannot, for the very same reason, be possibly called a “product of making,” or a “product of creation.” For the sense of the several terms differs very widely, and one who uses his phrases advisedly ought to employ words with due regard to the subject, that we may not, by improperly interchanging the sense of our phrases, fall into any confusion of ideas. Hence we call that which is wrought out by a craft the work of the craftsman, and call him who is begotten by a man that man's son; and no sane person would call the work a son, or the son a work; for that is the language of one who confuses and obscures the true sense by an erroneous use of names.
It follows that we must truly affirm of the Only-begotten one of these two things—if He is a Son, that He is not to be called a “product of creation,” and if He is created, that He is alien from the appellation of “Son,” just as heaven and sea and earth, and all individual things, being things created, do not assume the name of “Son.” But since Eunomius bears witness that the Only-begotten God is begotten (and the evidence of enemies is of additional value for establishing the truth), he surely testifies also, by saying that He is begotten, to the fact that He is not created. Enough, however, on these points: for though many arguments crowd upon us, we will be content, lest their number lead to disproportion, with those we have already adduced on the subject before us.
Source: Against Eunomius (New Advent)