CHAP. XV.] IMAGINATION AND VOLITION. 253 



Imagination, and Volition, on the other hand, as mere 

 higher developments arising out of previous processes, 

 have their seed-time in all that is unfamiliar among the 

 chance Sensorial Impressions which Animals, whose * ex- 

 perience ' is growing and whose Nervous Systems are 

 developing, are accustomed at intervals to receive from 

 the outer world. 



