VIIL] PLANTS AND ANIMALS. 137 



it sometimes to his advantage, but as often to his 

 disadvantage. He uses it to his disadvantage only 

 because he is ignorant of those laws upon which the 

 whole universe is governed, and by which the har- 

 mony of Nature, in spite of its immense diversity, 

 is attained. Is not this sufficient reason why an 

 elementary acquaintance with these laws should be 

 insisted upon ? 



