102.
St.Austin in his sixth book of the Trinity takes notice of a common argument used by the orthodox fathers against the Arians, to prove the co-eternity of the Son with the Father, that if the Son be the Wisdom and Power of God, as St.Paul teaches (1 'Cor'.

i.) and God was never without his Wisdom and Power, the Son must he co-eternal with the Father.

* * * But this acute Father discovers a great inconvenience in this argument, for it forces us to say that the Father is not wise, but by that Wisdom which he begot, not being himself Wisdom as the Father: and then we must consider whether the Son himself, as he is God of God, and Light of Light, may be said to be Wisdom of Wisdom, if God the Father be not Wisdom, but only begets Wisdom.
The proper answer to Augustine is, that the Son and Holy Ghost are necessary and essential, not contingent: and that 'his' argument has a still greater inconvenience, as shewn in note p.

98.
Ib.pp.

110-113.
But what makes St.Gregory dispute thus nicely, and oppose the common and ordinary forms of speech?
Did he in good earnest believe that there is but one man in the world?
No, no! he acknowledged as many men as we do; a great multitude who had the same human nature, and that every one who had a human nature was an individual man, distinguished and divided from all other individuals of the same nature.