114 ON THE PHYSICAL BASIS OF LIFE 



and the further concession that all vital action may, 

 with equal propriety, be said to be the result of the 

 molecular forces of the protoplasm which displays it. 

 And if so, it must be true, in the same sense and to the 

 same extent, that the thoughts to which I am now giv- 

 ing utterance, and your thoughts regarding them, are 

 the expression of molecular changes in that matter of 

 life which is the source of our other vital phsenomena. 



