HEREDITY 213 



because organisation will obey these rhythmic 

 forces which impel the whole of Nature, and these 

 energies possess enormous powers of tension and 

 are always ready on the first occasion to recover 

 their true equilibrium or synchronism with the 

 rhythms of which they are an echo. 



Thus it is explained how man has that surprising 

 vital resistance, because his powers of tension, 

 which have been necessary in order to build up the 

 structure of an organic and intelligent being, are 

 immeasurable, and only to be compared to the 

 energies from which they proceed. The force of 

 tension stored up by the psychic nerve, the 

 potential energy enclosed in the molecular 

 mechanism, constituting the substance of each one 

 of these cells, from the living force of which thought 

 is derived, is only understood by knowing the close 

 bond of dependence that they have with the infinite 

 rhythms of force. 



Let it not be thought, then, on expressing these 

 ideas on molecular equilibrium, that man's health 

 and resistance are somewhat fragile, but that, on 

 the contrary, his equilibrium is of immense tenacity 

 and stability, and the alteration of formula N is only 

 understood in the presence of the opposition and 

 violence, the pain and misery to which from time 

 immemorial the human race is subject. 



If man always found in the medium in which he 



