MOVEMENT OF ANIMALS, vi. 



tilings which move the animal are intellect, imagina- 

 tion, purpose, wish and appetite. Now all these can 

 be referred to mind and desire. For imagination 

 and sensation cover the same ground as the mind 

 (since they all exercise judgement) though they 

 differ in certain aspects as has been defined else- 

 where.** But will, temper, and appetite are all 

 forms of desire, while purpose partakes both of 

 intellect and of desire. So the objects of desire and 

 intellect first set up movement — not, however, every 

 object of intellect, but only the end in the sphere of 

 action. So amongst good things it is the good in the 

 sphere of action that sets up movement, and not any 

 and every good ; for it sets up movement only in so 

 far as it is the motive of something else or the end 

 of something which has something else as its object. 

 And we must lay dow^n the principle that the apparent 

 good can take the place of a real good, and so can the 

 pleasant, for it is an apparent good. So that it is 

 clear that in one respect that which is eternally 

 moved by the eternal mover, and the individual 

 animal, are moved in a similar manner, but that in 

 another respect they are moved differently ; and so, 

 while other things move eternally, animal movement 

 has a limit. Now the eternally beautiful and that 

 which is truly and primarily good, and not at one 

 moment good and at another not good, is too divine 

 and precious to have anything prior to it. 



The prime mover, then, moves without itself being 

 moved, but desire and the desiderative faculty set 

 up movement while being themselves moved. But 

 it is not necessary that the last of a series of things 

 which are moved should move anything ; and from 

 this it is clear that it is only reasonable that pro- 



459 



