Evolution of Mind. 253 



The special terminal organs are those for sight, hear- 

 ing, smell, taste, and touch. The brain is thus not a 

 self-contained organ, for it cannot exist or act of 

 itself. If it be detached from man it is no longer a 

 brain but a putrescence. 



The brain only works when in perfect accord with 

 the rest of the human mechanism. Thus if some of 

 the nerve fibres to a sense-organ be cut, it does not 

 respond to that sense ; hence it is from thencefor- 

 ward an imperfect machine, with the further conse- 

 quence that the man has not only an imperfect body 

 but an imperfect mind. 



As regards mental phenomena, so much do they 

 pervade the whole nervous area that the whole 

 mechanism of man must, more or less, be included in 

 his mental system. Consequently, while the brain is 

 said to be the organ of man's mind, it is really only 

 the centre, not the sum of it. 



Further, as the five sense organs constitute our 

 only media of intelligence, all our knowledge, as said, 

 comes from the cutside, not the inside ; hence, affili- 

 ated constituents of man's mental system are the 

 external environments of the ^senses — in effect, the 

 whole outside world. 



Man's intellectual horizon thus has through his 

 senses a circumference as vast as space ; his mind the 

 central jet of intelligence shedding rays of light into 

 the infinite, and so illuminating the universe that 

 Nature through him sees, reads, and understands 

 herself. 



