quote:
IV. If ever there was a time when the Father was not, then there was a time when the Son was not. If ever there was a time when the Son was not, then there was a time when the Spirit was not. If the One was from the beginning, then the Three were so too. If you throw down the One, I am bold to assert that you do not set up the other Two. For what profit is there in an imperfect Godhead? Or rather, what Godhead can there be if It is not perfect? And how can that be perfect which lacks something of perfection? And surely there is something lacking if it has not the Holy, and how would it have this if it were without the Spirit? For either holiness is something different from Him, and if so let some one tell me what it is conceived to be; or if it is the same, how is it not from the beginning, as if it were better for God to be at one time imperfect and apart from the Spirit? If He is not from the beginning, He is in the same rank with myself, even though a little before me; for we are both parted from Godhead by time. If He is in the same rank with myself, how can He make me God, or join me with Godhead?
V. Or rather, let me reason with you about Him from a somewhat earlier point, for we have already discussed the Trinity. The Sadducees altogether denied the existence of the Holy Spirit, just as they did that of Angels and the Resurrection; rejecting, I know not upon what ground, the important testimonies concerning Him in the Old Testament. And of the Greeks those who are more inclined to speak of God, and who approach nearest to us, have formed some conception of Him, as it seems to me, though they have differed as to His Name, and have addressed Him as the Mind of the World, or the External Mind, and the like. But of the wise men amongst ourselves, some have conceived of him as an Activity, some as a Creature, some as God; and some have been uncertain which to call Him, out of reverence for Scripture, they say, as though it did not make the matter clear either way. And therefore they neither worship Him nor treat Him with dishonour, but take up a neutral position, or rather a very miserable one, with respect to Him. And of those who consider Him to be God, some are orthodox in mind only, while others venture to be so with the lips also. And I have heard of some who are even more clever, and measure Deity; and these agree with us that there are Three Conceptions; but they have separated these from one another so completely as to make one of them infinite both in essence and power, and the second in power but not in essence, and the third circumscribed in both; thus imitating in another way those who call them the Creator, the Co-operator, and the Minister, and consider that the same order and dignity which belongs to these names is also a sequence in the facts
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https://www.newadvent.org/fathers/310231.htm
Paragraph V was quoted by an Arian today.