De Synodis

⁴² Accordingly, as in saying 'offspring,' we have no human thoughts, and, though we know God to be a Father, we entertain no material ideas concerning Him, but while we listen to these illustrations and terms, we think suitably of God, for He is not as man, so in like manner, when we hear of 'coessential,' we ought to transcend all sense, and, according to the Proverb, 'understand by the understanding what is set before us'; so as to know, that not by will, but in truth, is He genuine from the Father, as Life from Fountain, and Radiance from Light. Else why should we understand 'offspring' and 'son,' in no corporeal way, while we conceive of 'coessential' as after the manner of bodies? Especially since these terms are not here used about different subjects, but of whom 'offspring' is predicated, of Him is 'coessential' also. And it is but consistent to attach the same sense to both expressions as applied to the Saviour, and not to interpret 'offspring' in a good sense, and 'coessential' otherwise; since to be consistent, you who are thus minded and who say that the Son is Word and Wisdom of the Father, should entertain a different view of these terms also, and understand Word in another sense, and Wisdom in yet another. But, as this would be absurd (for the Son is the Father's Word and Wisdom, and the Offspring from the Father is one and proper to His essence), so the sense of 'Offspring' and 'Coessential' is one, and whoso considers the Son an offspring, rightly considers Him also as 'coessential.'

43. This is sufficient to show that the meaning of the beloved ones is not foreign nor far from the 'Coessential.' But since, as they allege (for I have not the Epistle in question), the Bishops who condemned the Samosatene have said in writing that the Son is not coessential with the Father, and so it comes to pass that they, for caution and honour towards those who have so said, thus feel about that expression, it will be to the purpose cautiously to argue with them this point also. Certainly it is unbecoming to make the one conflict with the others; for all are fathers; nor is it religious to settle, that these have spoken well, and those ill; for all of them fell asleep in Christ. Nor is it right to be disputatious, and to compare the respective numbers of those who met in the Councils, lest the three hundred seem to throw the lesser into the shade; nor to compare the dates, lest those who preceded seem to eclipse those that came after. For all, I say, are fathers; and yet not even the three hundred laid down nothing new, nor was it in any self-confidence that they became champions of words not in Scripture, but they fell back upon fathers, as did the others, and used their words. For there have been two of the name of Dionysius, much older than the seventy who deposed the Samosatene, of whom one was of Rome, and the other of Alexandria. But a charge had been laid by some persons against the Bishop of Alexandria before the Bishop of Rome, as if he had said that the Son was made, and not coessential with the Father. And, the synod at Rome being indignant, the Bishop of Rome expressed their united sentiments in a letter to his namesake. And so the latter, in defence, wrote a book with the title 'of Refutation and Defence.' and thus he writes to the other:

44. And I wrote in another Letter a refutation of the false charge which they bring against me, that I deny that Christ is coessential with God. For though I say that I have not found or read this term anywhere in holy Scripture, yet my remarks which follow, and which they have not noticed, are not inconsistent with that belief. For I instanced a human production, which is evidently homogeneous, and I observed that undeniably fathers differed from their children, only in not being the same individuals; otherwise there could be neither parents nor children. And my Letter, as I said before, owing to present circumstances, I am unable to produce, or I would have sent you the very words I used, or rather a copy of it all; which, if I have an opportunity, I will do still. But I am sure from recollection, that I adduced many parallels of things kindred with each other, for instance, that a plant grown from seed or from root, was other than that from which it sprang, and yet altogether one in nature with it; and that a stream flowing from a fountain, changed its appearance and its name, for that neither the fountain was called stream, nor the stream fountain, but both existed, and that the fountain was as it were father, but the stream was what was generated from the fountain.