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 



