v MR. DARWIN'S CRITICS 165 



particles of my nervous matter, caused by the 

 impact of a similar ball gives rise to the state of 

 consciousness I call pain. In ultimate analysis 

 everything is incomprehensible, and the whole 

 object of science is simply to reduce the funda- 

 mental incomprehensibilities to the smallest possi- 

 ble number. 



But to return to the Quarterly Reviewer. He 

 admits that animals have " mental images of 

 sensible objects, combined in all degrees of com- 

 plexity, as governed by the laws of association." 

 Presumably, by this confused and imperfect state- 

 ment the Reviewer means to admit more than the 

 words imply. For mental images of sensible 

 objects, even though " combined in all degrees of 

 complexity," are, and can be, nothing more than 

 mental images of sensible objects. But judg- 

 ments, emotions, and volitions cannot by any 

 possibility be included under the head of "mental 

 images of sensible objects." If the greyhound 

 had no better mental endowment than the 

 Reviewer allows him, he might have the " mental 

 image " of the " sensible object " the hare and 

 that might be combined with the mental images 

 of other sensible objects, to any degree of com- 

 plexity, but he would have no power of judging 

 it to be at a certain distance from him ; no power 

 of perceiving its similarity to his memory of a 

 hare ; and no desire to get at it. Consequently 

 he would stand stock still, and the noble art of 



