172 SPACE, TIME, MATTER, MOTION, AND FORCE. 



simultaneously with the development of the conceptions 

 of Space and Time : all three being evolved from the more 

 multiplied and varied impressions of muscular tension and 

 objective resistance. Motion, as we know it, is thus trace- 

 able, in common with the other ultimate scientific ideas, to 

 experiences of force. 



That this relative reality answers to some absolute real- 

 ity, it is needful only for form's sake to assert. What has 

 been said above, respecting the Unknown Cause which pro- 

 duces in us the effects called Matter, Space, and Time, will 

 apply, on simply changing the terms, to Motion. 



§ 50. We come down then finally to Force, as the ulti- 

 mate of ultimates. Though Space, Time, Matter, and Mo- 

 tion, are apparently all necessary data of intelligence, yet a 

 psychological analysis (here indicated only in rude outline) 

 shows us that these are either built up of, or abstracted from, 

 experiences of Force. Matter and Motion, as we know 

 them, are differently conditioned manifestations of Force. 

 Space and Time, as we know them, are disclosed along with 

 these different manifestations of Force as the conditions 

 under which they are presented. Matter and Motion are 

 concretes built up from the contents of various mental 

 relations; while Space and Time are abstracts of the forms 

 of these various relations. Deeper down than these, how- 

 ever, are the primordial experiences of Force, which, as 

 occurring in consciousness in different combinations, sup- 

 ply at once the materials whence the forms of relations are 

 generalized, and the related objects built up. A single 

 impression of force is manifestly receivable by a sentient 

 being devoid of mental forms: grant but sensibility, with 

 no established power of thought, and a force producing 

 some nervous change, will still be presentable at the sup- 

 posed seat of sensation. Though no single impression of 

 force so received, could itself produce consciousness (which 

 implies relations between different states), yet a multiplica- 



