734 THE PRINCIPLES OF SCIENCE. [CH. 



we also know that we are often inexplicably at fault in 

 our inferences. No one can safely generalise upon the 

 subtle variations of temper and emotion which may arise 

 even in a person of ordinary character. As human know- 

 ledge and civilisation progress, these characteristic differ- 

 ences tend to develop and multiply themselves, rather than 

 decrease. Character grows more many-sided. Two well 

 educated Englishmen are far better distinguished from 

 each other than two common labourers, and these are 

 better distinguished than two Australian aborigines. The 

 complexities of existing phenomena probably develop them- 

 selves more rapidly than scientific method can overtake 

 them. In spite of all the boasted powers of science, we 

 cannot really apply scientific method to our own minds 

 and characters, which are more important to us than all 

 the stars and nebulae. 



