 In this way, then, ancient philosophers typically justify moral virtue. Being courageous, just, and moderate is valuable for the virtuous person because these virtues are inextricably linked with happiness. Everyone wants to be happy, so anyone who realizes the link between virtue and happiness will also want to be virtuous. This argument depends on two central ideas. First, human excellence is a good of the soul – not a material or bodily good such as wealth or political power. Another way to put this idea is to say happiness is not something external, like wealth or political power, but an internal, psychological good. The second central idea is that the most important good of the soul is moral virtue. By being virtuous one enjoys a psychological state whose value outweighs whatever other kinds of goods one might have by being vicious.