WHAT IS PHYSICAL LIFE 

 The fundamental distinction between the 

 two lies in the transcendent fact that Man 

 is a person, something which no other ani- 

 mal is. A person living in a world of per- 

 sons shows in his most ordinary common- 

 place acts that there can be no real identity 

 between himself and animals. Writing a 

 letter and then dropping it into a street 

 mail box implies these differences from the 

 denizens of a cocoanut grove: a city with 

 everything which makes a city; a great 

 country where government provides post 

 offices by which letters may go anywhere 

 if properly stamped ; the faculty of speech 

 expressed now not by mouth but by a 

 typewriting machine on its special letter 

 paper. How can biology explain any of 

 these things? The most brilliant discov- 

 eries made by biologists have not been 

 made in man, but in worms, as by Wilson 

 in annelids, and by Boveri in ascarides. 

 These biologists could not have done bet- 



