In that excellent institution that Xenophon attributes to the Persians, we find that they taught their children virtue, as other nations do letters. Plato tells us that the eldest son in their royal succession was thus brought up; after his birth he was delivered, not to women, but to eunuchs of the greatest authority about their kings for their virtue, whose charge it was to keep his body healthful and in good plight; and after he came to seven years of age, to teach him to ride and to go a-hunting. When he arrived at fourteen he was transferred into the hands of four, the wisest, the most just, the most temperate, and most valiant of the nation; of whom the first was to instruct him in religion, the second to be always upright and sincere, the third to conquer his appetites and desires, and the fourth to despise all danger.