The rabbis of the Talmud had a lot to say on the World to Come, but little about what it actually is.
The idea that the soul is the human instrument of spirituality became more prominent over the course of Jewish history.
The Transmigrating Soul. Jewish Reincarnation. Jewish Life After Death. Jewish Afterlife and Eschatology. Jewish View on Next Life. Jewish Ideas and Beliefs
Though the survival of the soul after death is hinted at in the Hebrew Bible, it became an explicit doctrine only in the early centuries of the Common Era.
Amending prayers that mention resurrection to accord with modern sensibilities.
By the second century at the latest, belief in resurrection had entered Jewish liturgy and legal writing.
When and how will the dead will be brought back to life?