290 THE LESSON OF EVOLUTION 



tal, something which uses collocations of matter in 

 order to display itself amid material surroundings, 

 but is otherwise essentially independent of them." 



As a postscript he also wrote : "I think the 

 proof that life is spirit and not physical energy is 

 very important in theology, and it leads in fact to 

 theism. It is also equally important in biology, 

 where , if accepted , it will lead to considerable modi- 

 fications in our ideas of heredity and variation. 

 But I must leave these points to be worked out by 

 others. I am quite satisfied if I have simplified 

 matters by showing that mind and life are one." 



