Rabbi Steinsaltz
"If we were to look at this question from a Jewish point of view, I would answer in the following way: 'We are living in the worst of all possible worlds in which there is still hope.' There are, indeed, worlds below us in which there is no hope at all, and this is what we call 'Hell.' But to speak of the entire structure of our own world: it really is a world on the very brink."