154 Human Personality. 



simple sensation, we have in the human brain a grand 

 mass of cells capable of receiving and estimating the per- 

 ceptions of a hundred inferior ganglia, of comparing these 

 perceptions with other previously recoi'ded perceptions 

 from the same organs of the body and with those from 

 other organs ; of deciding as to the relative importance of 

 all these and of responding through the motor system of 

 nerves, in accordance with conclusions which are arrived 

 at after a final estimate of the grand total of perception, 

 reflex perception, and the thousandfold perception of per- 

 ceptions which make up the complicated process which 

 we commonly call thinking. 



It is of interest to examine the minute anatomy of the 

 neurons, and study the physiological mechanism by means 

 of which they join themselves together and unite their, 

 lives to form the human intellect. dLjnterest, because 

 this mechanism is the most wonderful thing in the world. 

 Throughout the length and breadth of our earth there is 

 nothing to compare with this sentient combine of brain 

 cells and the marvelous networks of living matter which 

 they put forth to sustain human self-consciousness. 



Under the microscope, as we are now able to use it, the 

 entire scheme of the soul's origin and maintenance is dis- 

 played. We see and are able to map out the mode of its 

 growth and discern how its manifold virtues, aspirations, 

 instincts, traits, and beliefs have come into existence and 

 stand linked together in a composite whole. Here is re- 



