It is unnecessary that knowledge should be concerned with existence as it is directly experienced in its concrete qualities. Direct experiencing itself takes care of that matter. What science is concerned with is the ha^enmg of these experienced things. For its purpose, therefore, they are happenings, events. Its aim is to discover the conditions and consequences of their happening. And this discovery can take place only by modify- ing the given qualities in such ways that relations become mani- fest. We shall see later that these relations constitute the proper objects of science as such.