INTELLIGENCE, POWER, 



virtue of his capacity for continued intensive application, 

 becomes the intellectual leader of his class. There may, 

 however, be a defect in the training and education of the 

 pupil with the super intellect in that he may not grasp 

 the advantage of training and coordinating the wild man 

 within him. Thus he may lack an introduction to the human 

 passions and emotions that the average human possesses, 

 missing the advantage of the commingling of civilized reac- 

 tions in the fighting, playing, mating man. The drudge 

 sometimes develops a deformed personality, or he develops 

 his wild' man out of season; but neither of these conditions 

 is so vital as the state of the brilliant student with brain 

 so abnormally keen that a high scholastic record is achieved 

 without effort. In these brilliant personalities excessive 

 brain activity may finally reach the physical state of a 

 breakdown. In certain instances an early senescence occurs 

 from which there is no recovery. 



Adult Life 



Individuals successful during middle life are character- 

 ized, as a rule, by a capacity for high sustained mental and 

 physical activity. It is characteristic of this group that the 

 first forty years are those of ease of achievement, great 

 activity, rarely with fatigue, and quick restoration. Whereas 

 the brain is very active and almost tireless in this successful 

 group during the first forty years, the driving of the body 

 at an abnormal speed taxes such organs as the heart, the 

 blood vessels, and the kidneys. 



Anyone can tell when his brain is tired because through 

 the brain his personality is expressed. No one can tell when 

 his heart, his blood vessels, or his kidneys are tired. These 

 organs are mute, and the first warning of possible impair- 

 ment is a diminished function. After that warning comes, 

 one of these organs may soon fail, and when one of these 

 vital organs fails it will bear down the life of the man. 



Exophthalmic goiter, or hyperthyroidism, is* a disease 



260 



