Plato, Protagoras

[325a] in short, what I may put together and call a man's virtue; and if it is this whereof all should partake and wherewith everyone should proceed to any further knowledge or action, but should not if he lacks it; if we should instruct and punish such as do not partake of it, whether child or husband or wife, until the punishment of such persons has made them better, [325b] and should cast forth from our cities or put to death as incurable whoever fails to respond to such punishment and instruction;—if it is like this, and yet, its nature being so, good men have their sons instructed in everything else but this, what very surprising folk the good are found to be! For we have proved that they regard this thing as teachable both in private and in public life, and then, though it may be taught and fostered, are we to say that they have their sons taught everything in which the penalty for ignorance is not death, but in a matter where the death-penalty or exile awaits their children [325c] if not instructed and cultivated in virtue—and not merely death, but confiscation of property and practically the entire subversion of their house—here they do not have them taught or take the utmost care of them? So at any rate we must conclude, Socrates.

They teach and admonish them from earliest childhood till the last day of their lives. As soon as one of them grasps what is said to him, the nurse, the mother, the tutor, and the father himself strive hard [325d] that the child may excel, and as each act and word occurs they teach and impress upon him that this is just, and that unjust, one thing noble, another base, one holy, another unholy, and that he is to do this, and not do that. If he readily obeys,—so; but if not, they treat him as a bent and twisted piece of wood and straighten him with threats and blows. After this they send them to school and charge the master to take far more pains over their children's good behavior than over their letters [325e] and harp-playing. The masters take pains accordingly, and the children, when they have learnt their letters and are getting to understand the written word as before they did only the spoken, are furnished with works of good poets to read as they sit in class, and are made to learn them off by heart: