The other side of science⁠—the abstract side⁠—when it holds strictly to its principles, replying directly to the question, always replies, and in all ages has replied, in one and the same way: “The world is something infinite and incomprehensible. Human life is an incomprehensible part of that incomprehensible ‘all.’ ” Again I exclude all those compromises between abstract and experimental sciences which supply the whole ballast of the semi-sciences called juridical, political, and historical. In those semi-sciences the conception of development and progress is again wrongly introduced, only with this difference, that there it was the development of everything while here it is the development of the life of mankind. The error is there as before: development and progress in infinity can have no aim or direction, and, as far as my question is concerned, no answer is given.