Kant could propose and answer the fundamental question of his philosophy, How is nature possible?, only because for him nature was nothing but the representation of nature. This does not mean merely that "the world is my representation," that we thus can speak of nature only so far as it is a content of our consciousness, but that what we call nature is a special way in which our intellect assembles, orders, and forms the sense-perceptions. These "given" perceptions, of color, taste, tone, temperature, resistance, smell, which in the accidental sequence of subjective experience course through our consciousness, are in and of themselves not yet "nature;" but they become "nature" through the activity of the mind, which combines them into objects and series of objects, into substances and attributes and into causal coherences. As the elements of the world are given to us immediately, there does not exist among them, according to Kant, that coherence which alone can make out of them the intelligible regular unity of nature; or rather, which signifies precisely the being-nature of those in themselves incoherently and irregularly emerging world-fragments. Thus the Kantian world-picture grows in the most peculiar reflection. Our sense impressions are for this process purely subjective, since they depend upon the physico-psychical organization, which in other beings might be different, but they become "objects" since they are taken up by the forms of our intellect, and by these are fashioned into fixed regularities and into a coherent picture of "nature."