This is thedomain of the natural scientist oriented purely toward the ends of his vocation, and within thisdomain in turn are distin guished: on the one hand that which has already been theoretically established and in a certain sense the whole horizon of the science to which it belongs, but in such a way that this in particular has been established within it; and on the other hand what must be set in the way of new tasks for the science, since what has been taken care of is always at the same time, after all, a foundation on which more must be built theoretically; namely, new questions must be posed and answered.