"Spiritual death means hell. Now suppose both death and hell were utterly defeated. Suppose the fight was fixed. Suppose God took you on a crystal ball trip into your future and you saw with indubitable certainty that despite everything -- your sin, your smallness, your stupidity -- you could have free for the asking your whole crazy heart's deepest desire: heaven, eternal joy. Would you not return fearless and singing? What can earth do to you if you are guaranteed heaven? To fear the worst earthly loss would be like a millionaire fearing the loss of a penny -- less, a scratch on a penny."
Peter Kreeft, Heaven, page 183.