In general, Jews expect to maintain a becoming agnosticism about metaphysics. They tend to observe the admonition of the second chapter of the Mishnah in Hagigah, namely that “whoever considers these four things, better that they should never have come into the World: what is above, what is below, what came before and what will be after.” Hence, it is considered slightly tasteless to speculate about Heaven, or the afterlife, or even the nature of the soul, in conventional Judaism.
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