324 THE GENESIS OF SPECIES. [CHAP. 



agent by which all organic forms have been called forth 

 from the inorganic. But all science tends to unity, and 

 this tendency makes it reasonable to attribute to all phy- 

 sical existences a mode of formation which we may have 

 evidence for in any one of them. It therefore makes it 

 reasonable to attribute, if possible, the very same agency 

 which we find operating in the field of biology, also to the 

 inorganic world. If on the grounds brought forward the 

 action of intelligence may be affirmed in the production of 

 man's bodily structure, it becomes probable a priori that it 

 may also be predicated of the formative action by which has 

 been produced the animals which minister to him, and all 

 organic life whatsoever. Nay more, it is then congruous 

 to expect analogous action in the development of crystal- 

 line and colloidal structures, and in chemical compositions, 

 in geological evolutions, and the formation not only of 

 this earth, but of the solar system and whole sidereal 

 universe. 



If such really be the direction in which physical science, 

 philosophically considered, points ; if intelligence may thus 

 be seen to preside over the evolution of each system of 

 worlds and the unfolding of every blade of grass this 

 grand result harmonizes indeed with the teachings of faith 

 that, in the natural order, God acts and concurs with those 

 laws of the material universe which were not only insti- 

 tuted by His will, but are sustained by His co-operation ; 

 and we are thus enabled to discern in the natural order, 

 however darkly, the Divine Author of nature Him in 

 whom " we live, and move, and have our being." 



But if this view is accepted, then it is no longer abso- 

 lutely necessary to suppose that any action different in 

 kind took place in the production of man's body, from that 



