70 THE HUMAN BRAIN. 



every day, and certainly with the first slumber. For if all that is 

 animal really died down to the surface of the earth in the seasons 

 of sleep, the body, heavy mass as it is, and belonging of right to 

 the ground, would be in the clutches of the grave, irrecallable from 

 its congenial gravitation. To prevent this, there are two brains, a 

 constant and an inconstant, but each, corresponding to the other. 

 The cerebellum does unconsciously and permanently whatever the 

 cerebrum performs rationally and by fits. The cerebellum follows 

 and adopts the states induced by the cerebrum on the organization, 

 and holds the notes of the ruling mind. Thus immediately after 

 sleep, the motions of thought may begin at once, for they have not 

 been organically, but only consciously suspended. We see this in 

 an image in the lungs. If the latter were voluntary organs, the 

 man would cease breathing so soon as he fell asleep. But they are 

 both voluntary and involuntary, the latter when not the former; and 

 the movement is always proceeding, night and day, so that it has 

 not to be created, but what is an easy matter, merely directed into 

 the voluntary channels. Similarly so with the organic motions of 

 thought and will : these are always going on, and merely require 

 direction, not creation, by the cerebrum. Concordantly with this 

 we can explain sleep, and much that occurs in sleep: e.g., the fact 

 that our thoughts and judgments are marvellously cleared and ar- 

 ranged during that state; as though a reason more perfect than 

 reason, and uninfluenced by its partialities, had been at work when 

 we were in our beds. This also — that our first waking thoughts are 

 often our finest and truest; and that dreams are sometimes eminent 

 and wise; which phenomena are incompatible with the idea that we 

 die down like grass into our organic roots at night, and are resusci- 

 tated as from a winter in the morning. And it must again be ad- 

 verted to, that this would not suit the Grand Economist; for after 

 nature has ascended to one plateau of life, represented by a day, she 

 will surely not tumble down into the valley because rest is needed, 

 but will pitch her tent, and make her couch upon that elevation. 

 "We conclude then that the cerebrum is the brain of the mind, and 

 the cerebellum the corresponding brain of the body ; and as during 

 sleep the cerebrum is a body, the cerebellum at such time is the 

 brain of the cerebrum also. It may be added that the cerebellum, 



