LAW; — ITS DEFINITIONS. 73 



ultimate it ic as regards the particular faculties 

 which are concerned in this kind of search. When 

 we have observed our facts, and when we have 

 summed up our figures, when we have recognised 

 the constant numbers, then our eyes, our ears, 

 and our calculating faculties have done their 

 work. But other faculties are called into simul- 

 taneous operation, and these have other work to 

 do. For let it be observed that laws, in the first 

 three senses we have now examined, cannot be 

 said to explain anything except the Order of sub- 

 ordinate phenomena. They set forth that order 

 as due to Force. They do nothing more. Least 

 of all do laws, in any of these three senses, ex- 

 plain themselves. They suggest a thousand 

 questions much more icurious than the ques- 

 tions which they solve. The very beauty and 

 simplicity of some laws is their deepest mystery. 

 What can their source be ? How is their uni- 

 formity maintained ? Every law implies a Force, 

 and all that we ever know is some numerical rule 

 or measure according to which some unknown 

 Forces operate. But whence come those mea- 

 sures — those exact relations to number, which 



