Solar and Planetary Evolution. 75 



ment of the imagination, the subjective creation of the individual 

 mind or ego. If there is any rational conception of evolution 

 possible to the Idealist, it is an evolution which is purely subjec- 

 tive — an evolution of thought, not of material things. 



The coming philosophy of evolution, it appears to me, will fur- 

 nish a more rational solution of these problems of thought than 

 either Positivism or Idealism proposes; — a solution in harmony 

 with science, realistic and monistic in its conception of the Ulti- 

 mate Reality, and furnishing, therefore, a rational ground of ex- 

 planation of those concomitant mental and physical phenomena 

 — as of the relation of molecular changes in the brain to conscious- 

 ness — which have so long been the despair of science and the su- 

 preme enigma of philosophy. 



