WHAT IS PHYSICAL LIFE 

 which is not easy to answer, and that is, 

 why men naturally disbelieve in the exist- 

 ence of anything if it be not testified to 

 directly by their bodily senses? Despite 

 all evidences of the imperfections, if not 

 of the untrustworthiness of those senses, 

 most people will promptly reject whatever 

 is not certified to by them, as if they con- 

 stitute the sole foundations of belief. 

 Reason may then protest, but she protests 

 in vain. 



All this is well illustrated by the history 

 of one great word, which like many simi- 

 lar words we owe to that remarkable race 

 which once appeared, as biologists would 

 say, like a human sport in the small coun- 

 try of Greece. Such sports in Nature 

 arise, no one knows why or how, and cer- 

 tainly it is not easy to account for the 

 wonderful variety of intellectual gifts 

 which the ancient Greeks possessed. Thus 

 our English language testifies to the lusty, 

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