EVIDENCE PROVING THE STATEMENT OF THE CASE 127 



sensation of worry the thinking power gets weakened, 

 and we have one of the most prolific sources of disease 

 in modern times brought on by the high pressure we 

 are ever sustaining. 



All these evidences tend to show that some day the 

 specialist will find in that intricate structure, the 

 human brain, a highly complex switch, by which we 

 are able to switch on and switch off connections from 

 a centra with the mass of cells of which the outer 

 brain is composed. And this centre is most delicately 

 poised. 1 



Marvellously complex, marvellously mechanical, 

 perfectly in harmony with chemical and physical 

 reactions a marvel of marvels, a miracle of miracles. 

 Such is the human brain an instrument on the proper 

 use of which depends, in great part, human happiness 

 or human misery. 



The fundamental reactions giving thought, perception, 

 feeling, self-consciousness, soul, mind, and so forth, are 

 all physical reactions, the great factor is the current of 

 Ether to cause the so-called chemical reactions. This is 

 the verdict of Biological science. 2 



1 " It is the central organ of the respiratory movements, and of 

 other important functions, and an injury to it immediately causes 

 death, whereas the large hemispheres of the fore brain (or the organ 

 of the ' soul,' in a restricted sense) can be removed bit by bit, and 

 even completely destroyed, without causing the death of the vertebrate 

 animal only its higher mental activities disappearing in consequence." 

 ("The History of Creation," Ernst Haeckel, 1892, vol. i. p. 350.) 



2 " The definition of the laws which have shaped, and are still 

 shaping, the course of progress in human society is the work of 

 science, no less than it has been her work to discover the laws which 

 have controlled the course of evolution throughout life in all the 

 lower stages. But the spirit in which she has addressed herself to 



