254 MENTAL CONSTITUTION OF ANIMALS. 



masses of space are formed by law ; law makes them in due 

 time theatres of existence for plants and animals ; sensation, 

 disposition, intellect, are all in like manner developed and 

 sustained in action by law. It is most interesting to observe 

 into how small a field the whole of the mysteries of nature 

 thus ultimately resolve themselves. The inorganic has been 

 thought to have one final comprehensive law, GRAVITATION. 

 The organic, the other great department of mundane things, 

 rests in like manner on one law, and that is DEVELOPMENT. 

 Nor may even these be after all twain, but only branches of 

 one still more comprehensive law, the expression of a unity, 

 flowing immediately from the One who is First and Last. 



