The belief in Resurrection precedes the early church, the Pharisees believed in it, while the Sadducees did not. Jesus demonstrated with His own life, death, and life again that He was, is THE Resurrection.
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While all of that is true, it is a non sequitur. That has nothing to do with hellfire and brimstone.
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As far as female angels go, all references in the Bible, Old and New Testament, are male angels— warriors and messengers. (Gabriel, Michael as examples). Christianity did not latch onto Greek philosophy of the afterlife, Christianity believed and believes in the Resurrected One.
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Once again, all true, but a non sequitur.
The belief that the human soul is immortal without God’s gift of eternal life is more of a Greek concept. The idea of a place where people are tormented for eternity is straight from Greek mythology. Nobody who believed the Torah and Tanakh believed such a thing.
The angel thing I mentioned spoke more to popular depictions of them, not the Biblical ones. It doesn’t really describe angels in any detail at all in the Bible; they have an ordinary human male appearance according to the story of Sodom and Gomorrah.
Popular depictions include those back in the Renaissance.
It is no accident that the Church was heavily influenced by Platonic ideals at the time, since (as I mentioned before) Plato wrote that the human soul had a female nature.