Many people think it is very necessary to hold to self and self interest. Yet even if man does differ from animals, he resembles them in this, that where there are two dogs and one has a bone before him, he does not want the other dog to touch his bone. Even though he is satisfied and does not require the bone himself, he still does not wish the other dog to come and touch it. "This is my bone", he thinks, "I will have it." And as long as the other dog is afraid, it is all right. But if the other dog is bigger, he will come and take the bone, and bite the first dog too. That is the picture of life.