perfects structure 15 



to know that we know it at all. Now this 

 law of habit we may reasonably regard as 

 exemplified in the life of every individual 

 LQ the long line of genealogical ascent that 

 connects us with our humblest ancestors, in 

 so far as every permanent advance in the 

 scale of life implies a basis of habit embodied 

 in a structure which has been perfected by 

 practice. 



And now, starting from the analogy just 

 noted — namely that habit connects successive 

 phases in the life of one individual as heredity 

 connects successive stages in the development 

 of one race — ^we may pass at length to our 

 problem. That analogy suggests the possi- 

 bility of an indefinite advance upwards in 

 the scale of life without the succession of in- 

 dividuals which heredity involves — provided, 

 of course, that a single individual lived 

 suflSciently long and did not grow old. 



