TRUE LESSON OF PROTESTANTISM 



system of systems of such atoms, in myriad-fold 

 orders of composition, and with movements 

 definitely coordinated in myriad-fold degrees of 

 complexity. Now, all the motion that goes into 

 any organism, latent in the air which it breathes 

 and the food which it assimilates, must come 

 out again as motion, and what comes out must 

 be the exact equivalent of what goes in. This 

 is what the doctrine of the correlation of forces 

 means when applied to the living organism and 

 to the nervous system. It means, too, that if 

 we were able to trace in detail the career of any 

 given quantity of atomic motion between the 

 times of its entering and its leaving the organ- 

 ism, we should find through all its innumerable 

 transformations an exact equivalence preserved. 

 But this means that the motion must always be 

 a motion of material particles, something that 

 can be quantitatively measured. Once introduce 

 into the circuit something that does not admit 

 of material measurement, such as a sensation of 

 colour, or an emotion of grief, and the whole 

 theory falls to the ground at once. 



When a given quantity of atomic motion in 

 the gray surface of the brain is used up, its 

 equivalent must appear in the form of some 

 other atomic motion, and cannot have been a 

 subjective feeling ; otherwise it is idle to talk 

 about any correlation and equivalence of forces 

 in the case. There can be no relation of equiv- 



