180 THE GLANDS REGULATING PERSONALITY 



Energy and Sensitivity 



In his classic Inquiries into Human Faculty, Francis Galton 

 laid down some fundamental considerations concerning energy 

 and sensitivity as mental traits. Energy he defined as the 

 capacity for labor, and declared it to be the measure of the full- 

 ness of life or vitality. Statistical study by him of men of genius 

 and their ancestors showed them to be endowed with a large 

 amount of energy. It has been said to be the absolute prerequi- 

 site of genius. Now if there is a single fact that has been well 

 established by investigations of the internal secretions, it is 

 that the energy quantum of an individual is a function of and 

 determined by his thyroid. The more thyroid he has, the more 

 energetic will he be — the less thyroid the less energetic, and the 

 lazier. The thyroid-centered individual, of the excess thyroid 

 type, actually burns up more food and produces more heat than 

 the ordinary organism. He burns himself up faster in general. 



When the thyroid sends more secretion into the blood, more 

 thyroxin, it accelerates all the functions and activities of the 

 organs. Tea and coffee produce loquacity because they stimu- 

 late the thyroid. People with thyroid dominant constitutions 

 talk fluently, rapidly, and continuously. Their energy ma] 

 them doers, actors rather than spectators. They get up early in 

 the morning, are on the go all day without surcease or fatigue, 

 go to bed late, and often suffer from insomnia. 



Thyroid deficients, however, are definitely the opposit 

 are quite conscious of the limited reserve of energy at their com- 

 DCL Also that they need plenty of refreshing sleep. Early to 

 bed and late to rise remains the leading maxim of health for 

 them In addition they find it necessary to sleep during the 

 . Forty winks or more in the afternoon makes a good deal of 

 difference to them. Taciturn, maiticulat< Blow, til 



etives applied to them by their friends as well as by t: 

 enemies. All because of an insufficient or inefficient supply of 



roid's iodine to their cells. The mobility i 

 organism is a measure of the amount of active iodine in it. The 

 ins for "energetic and lazy" are "well- 



lO'llIl.. 



8ensitivity, the abihl 



rption is anothi id quali 



Just as Qm thyroid p 

 He feels things more, I be 



