Some of what Nestorius noted seemed to be in line with the ideology expressed in the Early Church that LIFE ITSELF could never die....as it concerns God being unable to ever be defeated. Hence, for Nestorius, his ideology led him to advocate plainly that Christ was God and Christ could die - but when it came to God the Father and the rest of the Trinity, they could never be extinguished.
Some of this gets into the territory that others have often brought up in Church history when wondering what it means for the Lord to die - with others noting that it was impossible for the devil to defeat the Lord. I Corinthians 15 notes this in detail when it came to death being defeated because of the work of the Lord - as the Author of Life can never be destroyed (John 11)...he can no more be defeated/perish than God can stop being eternal since his very nature will not allow for it. So in a very real sense, it can be noted rather easily that God himself can die (in the person of Christ) even though God himself did not die as it concerns the rest of the Holy Trinity.
The dualistic dynamic with language makes a world of difference - as two natures existed in one person with Jesus, as seen in 2 Cor 5:19 when it notes that God was in Christ reconciling the world to Himself and Phil.2:8 notes Being found in appearance as a man, He humbled himself and became obedient to the point of death, even the death of the cross. Additionally, we see in John 10:18 where Jesus said no one takes my life from me, but I lay it down of myself. And yet even though Jesus was God and in communion with the Father, Jesus in committing his spirit to the Lord (as seen when He cried out once more to His Father saying, Into Your hands I commit My Spirit and then breathed His last and died) was obviously aware that His Father did not die on the Cross - the Father, who has always existed and NEVER died, was the one Christ (also God) turned to.
William Lane Craig noted this when having to address the issue. In
his words:
Christ could not die with respect to his divine nature but he could die with respect to his human nature. What is human death? It is the separation of the soul from the body when the body ceases to be a living organism. The soul survives the body and will someday be re-united with it in a resurrected form. That's what happened to Christ. His soul was separated from his body and his body ceased to be alive. He became temporarily a disembodied person. On the third day God raised him from the dead in a transformed body.
In short, yes, we can say that God died on the cross because the person who underwent death was a divine person. So Wesley was all right in asking, "How can it be, that Thou, my God, shouldst die for me?" But to say that God died on the cross is misleading in the same way that it is misleading to say that Christ died on the cross in relation to his human nature, but not in relation to his divine nature.
Jesus was God - and it was more than possible for God to die, as evidenced in Christ. Nonetheless, God the Father was not the one who died on the Cross even as Christ was fully God/Fully man - and yet the paradox doesn't have to be resolved. We can have the concept of truth in tension - knowing that Jesus really cannot be defeated. For Rev.1:18 says of Jesus I am He who lives and was dead, and behold I Am alive forever more....with this mentioned again in Rev.4:8-9 when it says he is the one
who was and is and is to come.
As another noted best,
"Was Nestorius promoting the heretical idea that two distinct persons resided in Jesus? It is hard to say because of the political and ecclesiastical rivalries that involved him in the church. Also, his ambiguous language was easily misunderstood among the many heresies swirling about (e.g. adoptionism, docetism, Apollonarianism, etc.) Nestorius was viewed as not fully appreciating the unity of Christs person. The West resolved the debate of the two-natures at the Council of Chalcedon (451 AD).......It should be acknowledged that Chalcedon did not entirely remove the mystery of the paradox that exists in the person of Christ. At best, the Chalcedonian Creed states what the two natures in one person does not mean"
With Nestorius in what he emphasized when saying Jesus (as God) could die but God the Father (as well as God the Holy Spirit) could not, it really is reflective on several levels with what the early Church noted when it came to Jewish believers (in the first century beforethe councils) had battles as it concerns the concept of the Divine Council - and the reality of the
Two Powers in Heaven idea that helped many Jews come to faith in Christ and developa Christological Monotheism since they could understand that the rabbis always taught that God had a lesser power to Him (regent) who was God as well and they co-ruled. Many are not aware of the relationships between rabbinic Judaism, Merkabah mysticism, and early Christianity - as it was the case that "
Two powers in heaven" was a very early category of heresy and one of the basic categories by which the rabbis perceived the new phenomenon of Christianity...yet the
y did not understand the reality of what Christianity advocated on the role of the Messiah nor did they know the history of what the rabbis before them had already said in agreement with the Messiah being Divine.
One Jewish scholar who did an amazing job on the issue is Daniel Boyarin, who wrote
Two Powers in Heaven; Or the Making of Heresy as well as the book entitled
Border Lines: The Partition of Judaeo-Christianity (as well as
The Gospel of the Memra: Jewish Binitarianism and the Prologue to John and the work "
The Jewish Gospels" where he noted at multiple points where the concept of the Messiah was always rooted in Jewish thought and echoed by what the rabbis said....and for Jews, the two powers are one and a person does not worship one without the other a
nd even Second Temple literature is replete with forms of bitheism, including the philonic logos and the Ezekiel traditions of an Angel of God in the image of a man appearing on the throne. ).
Additionally, Dr. Michael Heisner (of LOGOS Bible Software) did an excellent job covering the issue in his presentation entitled
The Naked Bible » Two Powers in Heaven ....more here in
The Divine Council and Jewish Binitarianism - YouTube or the following:
All of that is again said to bring home the point that Nestorius was very much in line with the Jewish Binatarianism concept - although others are free to debate it.