[Kolokotronis]

"But, if she did not sin since that moment onward, whether it was at her own conception or at the moment of Annunciation, she too would have been immortal!"

This doesn't follow. The Fathers are unanimous in declaring that we must join Christ in death if we are to join Him in the Resurrection.

[kosta50]

This doesn't follow. The Fathers are unanimous in declaring that we must join Christ in death if we are to join Him in the Resurrection

Because we are all born mortal, Kolo. We can only choose to die with Christ in our hearts or without Him. But die we must. Theotokos, on the other hand, was cleansed of all sin including the consequences of Adam's sin -- or else Christ would have been no different than we are, and I think the Fathers are unanimous that He was not born with ancestral sin.

[kosta50]

On the other hand, if Theotokos was made sinless in order to be a fitting vessel and never committed sin since that moment onward, she would have been another pre-Fall Eve and therefore immortal.