All the practical principles behind the Innovator's case for posterity, or society, or the species, are there from time immemorial in the . But they are nowhere else. Unless you accept these without question as being to the world of action what axioms are to the world of theory, you can have no practical principles whatsoever. You cannot reach them as conclusions: they are premises. (...) If nothing is self-evident, nothing can be proved. Similarly, if nothing is obligatory for its own sake, nothing is obligatory at all.