CONCLUDING REMARKS. 371 



human mind, from which, to say nothing of the special views 

 of metaphysicians and leaders in science, the ordinary ideas of 

 Man and Nature held by educated men differ so widely. How- 

 ever far these ideas may in their turn be left behind, the growth 

 which can be traced within the range of our own observation 

 and inference, is one of no scant measure. It may bear com- 

 parison with one of the great changes in the mental life of the 

 individual man, perhaps rather with the expansion and fixing 

 of the mind which accompanies the passage from infancy into 

 youth, than with the later steps from youth into manhoodj or 

 from manhood into old age. 





