CONSCIOUSNESS AND EXPERIENCE 261 



sion of labor. But psychology goes over the whole 

 ground from detecting every distinct act of ex 

 periencing, to seeing what need calls out the special 

 organ fitted to cope with the situation, and discov 

 ering the machinery through which it operates to 

 keep a-going the course of action. 



But, I shall be told, the wall that divides psy 

 chology from philosophy cannot be so easily 

 treated as non-existent. Psychology is a matter 

 of natural history, even though it may be admitted 

 that it is the natural history of the course of ex 

 perience. But philosophy is a matter of values; 

 of the criticism and justification of certain validi 

 ties. One deals, it is said, with genesis, with con 

 ditions of temporal origin and transition ; the other 

 with analysis, with eternal constitution. I shall 

 have to repeat that just this rigid separation of 

 genesis and analysis seems to me a survival from a 

 pre-evolutionary, a pre-historic age. It indicates 

 not so much an assured barrier between philosophy 

 and psychology as the distance dividing philos 

 ophy from all science. For the lesson that 

 mathematicians first learned, that physics and 

 chemistry pondered over, in which the biological 

 disciplines were finally tutored, is that sure and 

 delicate analysis is possible only through the pa 

 tient study of conditions of origin and development. 

 The method of analysis in mathematics is the 

 method of construction. The experimental method 



