Sin and virtue, good and bad, right and wrong, can be distinguished and determined on this principle. Virtue is what brings real happiness. What is called right is that which leads to happiness. What is good is good because it gives happiness; and if it does not do so it cannot be good, it cannot be virtue, it cannot be right. Whenever man has found virtue in unhappiness he has been mistaken; whenever he was wrong he has been unhappy. Happiness is the being of man; that is why he craves for it.