In addition to that sentience, which the insect or animal has, the human being is endowed with intellect. Intellect is what is cognized, which the animal need not do. So it is this power of the intellect to discriminate and interpret what is cognized that gives the individual being a sense of individuality and makes him consider himself something special in this manifestation. What is more, he goes to the extent of believing that the entire manifestation has been created for his benefit! So, all the time he is thinking, In what way can I benefit by exploiting nature?" And the extent to which the human being has 'benefited' himself, we can all see.