common human nature, and merely considers the question of profit and loss. Kindness, indeed, is of wider application than mere justice; for we naturally treat men alone according to justice and the laws, while kindness and gratitude, as though from a plenteous spring, often extend even to irrational animals. It is right for a good man to feed horses which have been worn out in his service, and not merely to train dogs when they are young, but to take care of them when they are old.
