It cannot otherwise exist, or at least endure, because mere thought does not remain sane. In a sense it becomes too simple to be sane. The temptation of the philosophers is simplicity rather than subtlety. They are always attracted by insane simplifications, as men poised above abysses are fascinated by death and nothingness and the empty air.
It needed another kind of philosopher to stand poised upon the pinnacle of the Temple and keep his balance without casting himself down (p89)."