I did not speak of immortality, but eternity.
Indeed there is an important difference between the two immortality underlies a continuity of life in this form or another, eternity is only an "inscription", a memory, of time and lasts as long as that -this (as long as time has its own existence), a bit like an image on its support.
According to general relativity, we live in a block universe where past, present and future are simultaneous.
Our classical conception of time is imbued with presentism, in fact we have the impression that the past no longer exists and that the future does not yet exist, as if we are "surfing" on a present wave advancing on nothingness.
This time of printing passes or flowing still wonder many scientific, it would be for many of them a product of consciousness, it is a vast subject ...
It is indeed one of the biblical teachings that time has only a relative dimension or past and present are only a linear perception of it. Hence the prophecies which can announce a distant future not yet realized, but inscribed in a space time not attached to the "present" moment. Like what, even with a metro behind, the sciences, with their current tools, only confirm what was already known, it is moreover its purpose, which completely sticks to the notion of relativity.
The consequences of this philosophy, which nevertheless stems from hard physics, is very important, because it would allow - even if this has not yet been demonstrated and remains in the domain of the empirical - to give a theoretical basis explaining the pre- cognition, retro-cognition, synchronicities (which were studied by Wolfgang Pauli, Nobel Prize in physics in 1945, metempsychosis) etc ...
or even divination and mantic, astrology, spiritualism, etc ...
We are therefore very far from the scientist and "materialist" vision that many people attribute to science.
True science is not which materialist, but covers everything related to the acquisition of knowledge or in any case certain knowledge, including that which materialists reject.