164 THE PROBLEM OF EVOLUTION 



nected with the occiput, and the control of our 

 actions depends upon definite parts of the brain. 

 Therefore what is regarded as belonging to the 

 higher intellectual life is not a simple, but a very com 

 plex quantity, and it has been proved that various 

 important parts of it are located in various por 

 tions of the cerebral surface. The consciousness of 

 volition may be regarded as the expression of the 

 activity of all the cerebral cortex collectively. But, 

 on the other hand, certain sensations, which we 

 term organic, and which are connected with the 

 activity of the body and of the organs of sense, 

 must be referred to definite regions of the brain. 

 Everywhere we find a complex, compound soul, no 

 where a simple entity. 1 



Answer to No. 3. It is certainly clear, and 

 is expressly admitted by us, that a large part 

 of our psychical activity is connected with the 

 cerebral cortex. This is true of all those 

 psychical processes in which the nerves play 

 an essential part, viz. sensation, sense-per 

 ception, and sense impulses and desires. (The 

 indirect, external dependence upon nervous 

 processes is granted also in the case of the 

 higher activity of the soul.) To this cerebral 

 cortex belongs everything which our language 

 has derived from the domain of sense e.g. 

 when a word is to be spoken or written, we 

 have images of its written appearance, its 



