Ad Afros Epistola Synodica

⁸ The Son's relation to the Father essential, not merely ethical.

Once more, let them say whether things originate could say, 'all things whatsoever the Father has are Mine.' Now, He has the prerogative of creating and making, of Eternity, of omnipotence, of immutability. But things originate cannot have the power of making, for they are creatures; nor eternity, for their existence has a beginning; nor of omnipotence and immutability, for they are under sway, and of changeable nature, as the Scriptures say. Well then, if these prerogatives belong to the Son, they clearly do so, not on account of His virtue, as said above, but essentially, even as the synod said, 'He is of no other essence' but of the Father's, to whom these prerogatives are proper. But what can that be which is proper to the Father's essence, and an offspring from it, or what name can we give it, save 'coessential?' For that which a man sees in the Father, that sees he also in the Son; and that not by participation, but essentially. And this is [the meaning of] 'I and the Father are one,' and 'he that has seen Me has seen the Father.' Here especially once more it is easy to show their folly. If it is from virtue, the antecedent of willing and not willing, and of moral progress, that you hold the Son to be like the Father; while these things fall under the category of quality; clearly you call God compound of quality and essence. But who will tolerate you when you say this? For God, who compounded all things to give them being, is not compound, nor of similar nature to the things made by Him through the Word. Far be the thought. For He is simple essence, in which quality is not, nor, as James says, 'any variableness or shadow of turning.' Accordingly, if it is shown that it is not from virtue (for in God there is no quality, neither is there in the Son), then He must be proper to God's essence. And this you will certainly admit if mental apprehension is not utterly destroyed in you. But what is that which is proper to and identical with the essence of God, and an Offspring from it by nature, if not by this very fact coessential with Him that begot it? For this is the distinctive relation of a Son to a Father, and he who denies this, does not hold that the Word is Son in nature and in truth.