The thinking understanding--this is the result of philosophy--is no more evident than anything else and derives its existence not from itself, but from the universal life. This universal life from which thought derives its perceptions, from which understanding derives its enlightenment, does not only exist as a general thing, but also in the form of infinitely varied individualities. And generalization, the relation of things, their number and extension, are no more, and no less, infinite than individualization and specialization. Every tree in the forest, every grain of a pile of sand, are individual, separate, distinct. Every particle of every grain of sand is distinctly individual. And the infinite individualization of nature goes so far that, just as the human individual is different every day, every hour, every moment, so is the individual grain of sand, even though its transformations were not to become noticeable until after thousands of years, by accumulated changes. By classifying this contradictory, infinitely general and infinitely individual nature in groups according to time and space, in classes, genera, families, species, orders, and other subdivisions, we are discerning and understanding. In the universe, every group is an individual and every individual is a group. The uniformity of nature is not greater than its variety. Both of them are infinite. We distinguish between time and space. Every moment is composed of little moments. The smallest division of time cannot be denominated any more than the largest, just because there is no smallest and no largest in the universe, neither in time nor in space. Atoms are groups. As smallest parts they exist only in our thoughts and thus give excellent service in chemistry. The consciousness that they are not tangible, but only mental things, does not detract from their usefulness, but heightens it still more. It is the nature of human intelligence to divide, classify, group. We divide the world into four cardinal points; we also divide it into two kingdoms, the kingdom of the mind and the kingdom of nature; the latter we again subdivide into the organic and the inorganic, or perhaps into the mineral, vegetable, and animal kingdoms. In short, science seeks to illumine the universe by division. The question then arises: Which is the genuine and true division? Where does the variety of science, its undecided vacillation end, and when does understanding become stable? The reader should remember that the things, the objects of understanding, are not fixed, but also variable objects, and that the whole universe is moving, progressing; that especially the human mind becomes more and more affluent from century to century, from year to year, and that for this reason science is not alone compelled to fix things, but also to remain in flow. The fixed and the fluid are not so widely separated in science any more, that the evidence could not be evident and yet at the same time a little doubtful.