De Decretis

³¹ Therefore it will be much more accurate to denote God from the Son and to call Him Father, than to name Him and call Him Unoriginated from His works only; for the latter term refers to the works that have come to be at the will of God through the Word, but the name of Father points out the proper offspring from His essence. And whereas the Word surpasses things originated, by so much and more also does calling God Father surpass the calling Him Unoriginated; for the latter is non-scriptural and suspicious, as it has various senses; but the former is simple and scriptural, and more accurate, and alone implies the Son. And 'Unoriginated' is a word of the Greeks who know not the Son: but 'Father' has been acknowledged and vouchsafed by our Lord; for He knowing Himself whose Son He was, said, 'I in the Father and the Father in Me;' and, 'He that has seen Me has seen the Father.' and, 'I and the Father are one;' but nowhere is He found to call the Father Unoriginated. Moreover, when He teaches us to pray, He says not, 'When ye pray, say, O God Unoriginated,' but rather, 'When ye pray, say, Our Father, which art in heaven.' And it was His Will, that the Summary of our faith should have the same bearing. For He has bid us be baptized, not in the name of Unoriginate and Originate, not into the name of Uncreate and Creature, but into the name of Father, Son, and Holy Spirit, for with such an initiation we too are made sons verily, and using the name of the Father, we acknowledge from that name the Word in the Father. But if He wills that we should call His own Father our Father, we must not on that account measure ourselves with the Son according to nature, for it is because of the Son that the Father is so called by us; for since the Word bore our body and came to be in us, therefore by reason of the Word in us, is God called our Father. For the Spirit of the Word in us names through us His own Father as ours, which is the Apostle's meaning when he says, 'God has sent forth the Spirit of His Son into your hearts, crying, Abba, Father.'

32. But perhaps being refuted as touching the term Unoriginate also, they will say according to their evil nature, 'It behooved, as regards our Lord and Saviour Jesus Christ also, to state from the Scriptures what is there written of Him, and not to introduce non-scriptural expressions.' Yes, it behooved, say I too; for the tokens of truth are more exact as drawn from Scripture, than from other sources; but the ill disposition and the versatile and crafty irreligion of Eusebius and his fellows, compelled the Bishops, as I said before, to publish more distinctly the terms which overthrew their irreligion; and what the Council did write has already been shown to have an orthodox sense, while the Arians have been shown to be corrupt in their phrases, and evil in their dispositions. The term Unoriginate, having its own sense, and admitting of a religious use, they nevertheless, according to their own idea, and as they will, use for the dishonour of the Saviour, all for the sake of contentiously maintaining, like giants, their fight with God. But as they did not escape condemnation when they adduced these former phrases, so when they misconceive of the Unoriginated which in itself admits of being used well and religiously, they were detected, being disgraced before all, and their heresy everywhere proscribed. This then, as I could, have I related, by way of explaining what was formerly done in the Council; but I know that the contentious among Christ's foes will not be disposed to change even after hearing this, but will ever search about for other pretences, and for others again after those. For as the Prophet speaks, 'If the Ethiopian change his skin, or the leopard his spots ', then will they be willing to think religiously, who have been instructed in irreligion. Thou however, beloved, on receiving this, read it by yourself; and if you approve of it, read it also to the brethren who happen to be present, that they too on hearing it, may welcome the Council's zeal for the truth, and the exactness of its sense; and may condemn that of Christ's foes, the Arians, and the futile pretences, which for the sake of their irreligious heresy they have been at the pains to frame among themselves; because to God and the Father is due the glory, honour, and worship with His co-existent Son and Word, together with the All-holy and Life-giving Spirit, now and unto endless ages of ages. Amen.