15. The Theory of Categories
Now whence comes this network of concepts itself? Here that can only be asserted as fact, for the answer to this question can only result as the consequence of the logical path which we shall yet be able to take together. Today I will only give you a picture of this network of concepts, in order to show whence the network, which a man weaves within him, takes it origin. That is best made clear by a shadow picture. The shadow-picture of the hand would never arise if the hand were not there. The shadow-picture resembles its prototype, but it has one peculiarity! it is nothing! Through the fact that in the place of light the non-light comes, through the obliteration (obscuring??) of the light the shadow-picture comes into being.[^1] The concepts arise in exactly the same way, through the fact that behind our thinking soul there stands the super-sensible reality.