"The phrase is rare, but it does appear twice in the OT. In Isaiah 44.23 it appears in contrast with heaven: “Sing O ye heavens; … shout, ye lower parts of the earth.” Here it clearly means the earth as distinguished from heaven; grammarians would call this a 'genitive of apposition'—'ye lower parts, that is to say, the earth.'" - Olinger
"She asked, 'Why has my youth leader never told me about hell?' With tears in her eyes she told me that she had never heard about the theology of hell and the urgency and responsibility of rescuing her friends from this coming judgment. She was upset that her youth leader never told her about it." - Church Leaders
"Hell is not horrible due to alleged implements of torture or its temperature. (After all, it is described variously in Scripture as 'outer darkness' and a 'lake of fire.') Whatever the exact nature of this everlasting judgment, it is horrible ultimately for one reason only: God is present." - Michael Horton
This is a formal statement from an organization called “Rethinking Hell!” This organization explains “our position in the Evangelical debate on Hell is that of Conditional Immortality, which holds that believers will receive the reward of immortality, while others will finally be destroyed (annihilated).” Below, you can read the group’s formal statement (also available to view on its website and to download in PDF format):
Conditionalism is the view that life is the Creator’s provisional gift to all, which will ultimately be granted forever to the saved and revoked forever from the unsaved.
Evangelical conditionalists believe that the saved in Christ will receive glory, honor and immortality, being raised with an incorruptible body to inherit eternal life (Romans 2:7).