NATURAL HISTORY OF CREATION. 257 



children wlio liave been all brought up in circumstances 

 perfectly identical — even in twins, who have never been 

 but in one place, under the charge of one nurse, attended 

 to alike in all respects. The mental characters of indi- 

 viduals are inherently various, as the forms of their per- 

 sons and the features of their faces are ; and education 

 and circumstances, though their influence is not to be 

 despised, are incapable of entirely altering these cha- 

 racters, where they are strongly developed. That the 

 original characters of mind are dependent on the volume 

 of particular parts of the brain and the general quality of 

 that viscus, is proved by induction from an extensive 

 range of observations, the force of which must have been 

 long since universally acknowledged but for the un- 

 preparedness of mankind to admit a functional connexion 

 between mind and body. The different mental cha- 

 racters of individuals may be presumed from analogy to 

 depend on the same law of development which we have 

 seen determining fornis of being and the mental cha- 

 racters of particular species. This we may conceive as 

 carrying forward the intellectual powers and moral 

 dispositions of some to a high pitch, repressing those of 

 others at a moderate amount, and thus producing all the 

 varieties which we see in our fellow-creatures. Thus a 

 Cuvier and a Newton are but expansions of a clown, and 

 the person emphatically called the wicked man, is one 

 whose highest moral feelings are rudimental. Such 

 differences are not confined to our species ; they are only 

 less strongly marked in many of the inferior animals. 

 There are clever dogs and wicked horses, as well as 

 clever men and wicked men ; and education sharpens the 

 talents, and in some degree regulates the dispositions of 

 animals, as it does our own. Here I may advert to a 

 very interesting analogy between the mental diameters 



