Sorry, ViaCrucis, while I respect you, and I surely respect early Christian leaders, I don't feel I have to stick to their formulations and articulations in an exacting fashion, so anything that St. Gregory or St. Athanasius had to say is secondary to that of Jesus and the Apostles; useful, yes, but fully authoritative, no.
I don't expect anyone to agree with me, but I think of Jesus' incarnate state as a moment when He placed Himself into a temporary human body; He was still the Logos, just
a temporarily transformed Logos/God. So, in essence, my perception of Jesus is that He was still God, but He voluntarily transformed Himself into a vulnerable human self--still spiritually 'one' with the Father. And at His resurrection, His 'physicality' rejoined, so to speak, the Spiritual, non-flesh essence of the Father and the Holy Spirit, with whom He was already One.
Furthermore, from a human perspective, I'm fairly confident that no one has the 'Final Formula' of God's exact nature ... not me, not the Early Church Fathers, not Athanasius, not Augustine, not the various Popes, not Orthodox Patriarchs, not Luther, not Calvin, not Billy Graham ... no one but the Lord Himself. We have but a simple (revealed) description given to us in Scripture, an allusion to God's Fullness of which only He Himself is fully aware.
p.s. This is the only response I'll write here for reasons pertaining to forum rules, but if you think we need to discuss this further, I'm open to doing so on another thread.
2PhiloVoid