In truth-- one thing is certain; there exists a night into whose solitude no voice reaches; there is a door through which we can only walk alone -- the door of death. In the last analysis all the fear in the world is fear of this loneliness. From this point of view, it is possible to understand why the Old Testament has only one word for hell and death, the word sheol; it regards them as ultimately identical. Death is absolute loneliness. But the loneliness into which love can no longer advance is -- hell.