ABSTRACT
The experiences which form the material of psychology appear to us in such a many-sided, constantly-changing multiplicity, that at first glance it seems impossible to control them scientifically. How shall we determine, describe, and name the kaleidoscopic events in which there is no systematic organization and in which scarcely any uniformities can be discovered? Mental processes, however, do appear as complete unities. They are not represented to us as more or less independent members like those which compose an organism, or as ready-cut pieces like the building stones which make up a house. Everything is closely interrelated. There are no gaps, and one process seems to pass continuously over into another process. Nevertheless, a way remains open, which, even if it is tedious, eventually leads through the almost inextricable thicket of difficulties — that is, we can grasp at the same time similar, or at least related, aspects of different experiences.
