108 THE WORLD-ENERGY 



of thought. For those categories are nothing else than 

 the names, first, of that which is necessarily presupposed 

 in all thought, and, secondly, of those fundamental 

 modes in which alone it can be comprehended in thought. 

 We may criticise the list as we will. It still is a series of 

 names representing concepts without which thought and 

 things would be alike impossible. 



Let us now remind ourselves once more that the funda- 

 mental qualities of the matter or substance of the extended 

 world are, primarily, attraction and repulsion, and that 

 these are opposed and yet also mutually inclusive phases 

 of force. Whence it appears that action and passion are 

 but further (that is, more explicit) aspects of the neces- 

 sary interrelation between attraction and repulsion. They 

 are the phases of action and reaction in the total process 

 of the self-measured. 



We have already seen how quality finds its truth in the 

 intensive phase of quantity. It now appears, too, that 

 quality and quantity are but modes of substance, or of 

 the self -measured Total. So that the ultimate truth of 

 relation is found to be the self-relation of the Total. 



The substance of the extended world, then, is Energy, 

 which presents itself as an all-inclusive process, whose 

 fundamental phases are action and reaction. This is the 

 essence, the very nature, the true internality of the 

 external world. It is the noumenon or reality bringing 

 itself into open manifestation through or, rather, as 

 the all-pervasive, all-energizing process of the world. 

 This, indeed, brings us to the consideration of motion, 

 which involves not merely the space-relations already 

 brought under review, but also the fundamental relations 

 of succession that is, time-relations. 



