Which Bible did you use, JD?
Isaiah 14:9-10
English Standard Version (ESV), but same with KJV and American Standard Version, and Young's Literal Translation, and the New American Bible.
Isaiah 29:4
Young's Literal Translation (YLT), New American Bible, KJV, New American Standard Bible.
Even Job, a blameless and upright man, acknowledged the existence of the departed dead, the shades, in Sheol, where, in his reply to Boldad's third speech he said, “The shades (rephaim) beneath writhe in terror, the waters and their inhabitants. Naked before him is the nether world (Sheol), and Abaddon has no covering.” (Job 26:5,6, NAB). Not only do shades exist, but they exhibit emotions and tremble.
Similarly, the inspired writers of the Book of Proverbs were fully aware that the departed dead, the shades, reside in Sheol, the nether world; they were not annihilated, they did not become extinct at death. Speaking of the ways of the adulteress, Proverbs 2:18 provides: “For her path sinks down to death, and her footsteps lead to the shades (rephaim) (NAB). Referring to those who live a life of folly, Proverbs 9:18 warns, “Little he knows that the shades are there, that in the depths of the nether world (sheol) are her guests” (NAB). And Proverbs 21:16 is an unambiguous warning, “The man who strays from the way of good sense will abide in the assembly of the shades (rephaim).
One common misconception is that Sheol (Hebrew) is a place where only the wicked, unredeemed go, but that is not the case (PBD at 784). The grieving patriarch Jacob was inconsolable when told of his son Joseph's (fabricated) death, stating, “No, I will go down mourning to my son in the nether world (Sheol) (Genesis 37:35). Jacob, son of Isaac and father of twelve sons who in turn would father the twelve tribes of Israel, believed his eleventh son, Joseph, was dead and departed to Sheol, not extinct, and his grief was such that he wished to join him. And Job, while enduring excruciating torment, pleaded to God for shelter in the nether world of Sheol. He did not want to go there to be tormented further, but to escape the agony and torment he was suffering on earth, and then return: “Oh, that you would hide me in the nether world and keep me sheltered till your wrath is past,” (Job 14:13). His agony was so great he wondered why he wasn't delivered a stillborn baby; then he would find rest in Sheol:” For then I would have lain down and been quiet; I would have slept; then I would have been at rest. (Job 3:13, ESV). One cannot be extinct and non-existent and yet enjoy restful sleep and later return to the world when God's wrath is over. It's not possible.
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