All things change, the activities and their interrelations. To this new concept, the notion of space with its passive, systematic, geometric relationship is entirely inappropriate. The fashionable notion that the new physics has reduced all physical laws to the statement of geometrical relations is quite ridiculous. It has done the opposite. In the place of the Aristotelian notion of the procession of forms, it has substituted the notion of the forms of process. It has thus swept away space and matter, and has substituted the study of the internal relations within a complex state of activity. This complex state is in one sense a uhity. There is the whole universe of physical action extending to the remotest star cluster. In another sense, it is divisible into parts. We can trace interrelations within a selected group of activities, and ignore all other activities. By such an abstraction we shall fail to explain those intemal activities which are affected
