Glaucon then asks Socrates whether the best physicians and the best judges will not be those who have had severally the greatest experience of diseases and of crimes. Socrates draws a distinction between the two professions. The physician should have had experience of disease in his own body, for he cures with his mind and not with his body. But the judge controls mind by mind; and therefore his mind should not be corrupted by crime. Where then is he to gain experience? How is he to be wise and also innocent? When young a good man is apt to be deceived by evil-doers, because he has no pattern of evil in himself; and therefore the judge should be of a certain age; his youth should have been innocent, and he should have acquired insight into evil not by the practice of it, but by the observation of it in others. This is the ideal of a judge; the criminal turned detective is wonderfully suspicious, but when in company with good men who have experience, he is at fault, for he foolishly imagines that every one is as bad as himself. Vice may be known of virtue, but cannot know virtue. This is the sort of medicine and this the sort of law which will prevail in our State; they will be healing arts to better natures; but the evil body will be left to die by the one, and the evil soul will be put to death by the other. And the need of either will be greatly diminished by good music which will give harmony to the soul, and good gymnastic which will give health to the body. Not that this division of music and gymnastic really corresponds to soul and body; for they are both equally concerned with the soul, which is tamed by the one and aroused and sustained by the other. The two together supply our guardians with their twofold nature. The passionate disposition when it has too much gymnastic is hardened and brutalized, the gentle or philosophic temper which has too much music becomes enervated. While a man is allowing music to pour like water through the funnel of his ears, the edge of his soul gradually wears away, and the passionate or spirited element is melted out of him. Too little spirit is easily exhausted; too much quickly passes into nervous irritability. So, again, the athlete by feeding and training has his courage doubled, but he soon grows stupid; he is like a wild beast, ready to do everything by blows and nothing by counsel or policy. There are two principles in man, reason and passion, and to these, not to the soul and body, the two arts of music and gymnastic correspond. He who mingles them in harmonious concord is the true musician, – he shall be the presiding genius of our State.
The next question is, Who are to be our rulers? First, the elder must rule the younger; and the best of the elders will be the best guardians. Now they will be the best who love their subjects most, and think that they have a common interest with them in the welfare of the state. These we must select; but they must be watched at every epoch of life to see whether they have retained the same opinions and held out against force and enchantment. For time and persuasion and the love of pleasure may enchant a man into a change of purpose, and the force of grief and pain may compel him. And therefore our guardians must be men who have been tried by many tests, like gold in the refiner's fire, and have been passed first through danger, then through pleasure, and at every age have come out of such trials victorious and without stain, in full command of themselves and their principles; having all their faculties in harmonious exercise for their country's good. These shall receive the highest honours both in life and death. (It would perhaps be better to confine the term 'guardians' to this select class: the younger men may be called 'auxiliaries.')
And now for one magnificent lie, in the belief of which, Oh that we could train our rulers! – at any rate let us make the attempt with the rest of the world. What I am going to tell is only another version of the legend of Cadmus; but our unbelieving generation will be slow to accept such a story. The tale must be imparted, first to the rulers, then to the soldiers, lastly to the people. We will inform them that their youth was a dream, and that during the time when they seemed to be undergoing their education they were really being fashioned in the earth, who sent them up when they were ready; and that they must protect and cherish her whose children they are, and regard each other as brothers and sisters. 'I do not wonder at your being ashamed to propound such a fiction.' There is more behind. These brothers and sisters have different natures, and some of them God framed to rule, whom he fashioned of gold; others he made of silver, to be auxiliaries; others again to be husbandmen and craftsmen, and these were formed by him of brass and iron. But as they are all sprung from a common stock, a golden parent may have a silver son, or a silver parent a golden son, and then there must be a change of rank; the son of the rich must descend, and the child of the artisan rise, in the social scale; for an oracle says 'that the State will come to an end if governed by a man of brass or iron.' Will our citizens ever believe all this? 'Not in the present generation, but in the next, perhaps, Yes.'
Now let the earthborn men go forth under the command of their rulers, and look about and pitch their camp in a high place, which will be safe against enemies from without, and likewise against insurrections from within. There let them sacrifice and set up their tents; for soldiers they are to be and not shopkeepers, the watchdogs and guardians of the sheep; and luxury and avarice will turn them into wolves and tyrants. Their habits and their dwellings should correspond to their education. They should have no property; their pay should only meet their expenses; and they should have common meals. Gold and silver we will tell them that they have from God, and this divine gift in their souls they must not alloy with that earthly dross which passes under the name of gold. They only of the citizens may not touch it, or be under the same roof with it, or drink from it; it is the accursed thing. Should they ever acquire houses or lands or money of their own, they will become householders and tradesmen instead of guardians, enemies and tyrants instead of helpers, and the hour of ruin, both to themselves and the rest of the State, will be at hand.
The religious and ethical aspect of Plato's education will hereafter be considered under a separate head. Some lesser points may be more conveniently noticed in this place.
1. The constant appeal to the authority of Homer, whom, with grave irony, Plato, after the manner of his age, summons as a witness about ethics and psychology, as well as about diet and medicine; attempting to distinguish the better lesson from the worse, sometimes altering the text from design; more than once quoting or alluding to Homer inaccurately, after the manner of the early logographers turning the Iliad into prose, and delighting to draw far-fetched inferences from his words, or to make ludicrous applications of them. He does not, like Heracleitus, get into a rage with Homer and Archilochus (Heracl.), but uses their words and expressions as vehicles of a higher truth; not on a system like Theagenes of Rhegium or Metrodorus, or in later times the Stoics, but as fancy may dictate. And the conclusions drawn from them are sound, although the premises are fictitious. These fanciful appeals to Homer add a charm to Plato's style, and at the same time they have the effect of a satire on the follies of Homeric interpretation. To us (and probably to himself),