Metaphysical World.—It is true, there may be a metaphysical world; the absolute possibility of it can scarcely be disputed. We see all things through the medium of the human head and we cannot well cut off this head: although there remains the question what part of the world would be left after it had been cut off. But that is a purely abstract scientific problem and one not much calculated to give men uneasiness: yet everything that has heretofore made metaphysical assumptions valuable, fearful or delightful to men, all that gave rise to them is passion, error and self deception: the worst systems of knowledge, not the best, pin their tenets of belief thereto. When such methods are once brought to view as the basis of all existing religions and metaphysics, they are already discredited. There always remains, however, the possibility already conceded: but nothing at all can be made out of that, to say not a word about letting happiness, salvation and life hang upon the threads spun from such a possibility. Accordingly, nothing could be predicated of the metaphysical world beyond the fact that it is an elsewhere,⁶ another sphere, inaccessible and incomprehensible to us: it would become a thing of negative properties. Even were the existence of such a world absolutely established, it would nevertheless remain incontrovertible that of all kinds of knowledge, knowledge of such a world would be of least consequence—of even less consequence than knowledge of the chemical analysis of water would be to a storm tossed mariner.