i've just been thinking more about how to fit together the hindu and other religions concept of reincarnation, with the "eternal life" stuff in the bible
it's quite simple actually, and not any kind of necromantic craziness
if you know about the theory of how reincarnation works, then you would know that one of the elements of the process is that the rebirth process involves erasing the memory of past lives.
then you can say, that maybe what the biblical texts were talking about is a knowledge and technique whereby newly born individuals, who had a past history of previous lives, have that cloud of forgetting removed, and are born with the full memory of all of their past lives.
this would totally qualify as an "eternal life" because if all who are born, have this done, then even though they live the mortal life, they know all of their "eternal life" history, and it works out much the same. except for that process of the development of the body, the first 35 or so years of life the memory would be there but the capacities would not be fully developed yet.
the other thing is that according to those old texts, and other stories from ancient history, the capacity for lifespan of humans is actually around 800 years.
so, combined with full past life recall, and extended lifespan, you would have something as near enough to the actual realisation of this concept of "eternal life" while reconciling the apparent differences between reincarnationist model versus the eternal life model.
i know it would be quite shocking to have a baby and within a year it's telling you stories in fully adult language of their history, maybe even able to speak multiple languages, but i think this is what it actually means.
it happens occasionally, by accident, there is many accounts of this in recent historical lore about reincarnation. the buddhists select their Dalai Lama based on physical markings that transit between lives, it's a mark on the foot, if i remember correctly. some cases exist also of small children telling stories of their past lives that were verifiable, as well.
this synthesis resolves the apparent differences between the two, and hints at what is to come, when our branch of the human tree wakes up and starts to bloom as well.