I need not stay here to point out the immense importance of this process of defining and particularizing constructs, or the length to which it may be carried; nor need I pause to indicate how, through memory and association, representative or reconstructive elements crowd in to link or weave the constructs into more or less vivid and brilliant scenes. But I have next to notice that out of this intelligent examination arises a new, distinct mental process, _the analysis of constructs_. This process involves the paying of special attention to certain qualities of objects, to the intentional exclusion of other qualities. When I cease to examine an orange as a construct, and pay attention to its colour or its taste to the exclusion of other properties, with the purpose of comparing this colour or taste with other colours and tastes, I am making a step in analysis. So, too, when I consider the form of an orange for the purpose of comparing it with the form of the earth, I am making a step in analysis. And, again, when I consider the howl of the dog with the object of comparing it with other sounds, I am making a step in analysis. We may call the process by which we select a certain quality, and consider it by itself to the neglect of other qualities, _isolation_, and the products of the process we may term _isolates_.[FU] This process could not be initiated till a large body of constructive and reconstructive experience had been gained. But once initiated, there is no end to the process. We pick to pieces all the phenomena of nature, all the qualities and relationships of objects, the activities and functions of animals, the mental phenomena of which we are conscious in ourselves. We isolate the qualities, relationships, feelings; and we name the isolates we obtain. Hence arises all our science, all our higher thought. In the terms which we apply to our isolates consists the richness of our language.