Of course this was not the original assertion, nor is the new interpretation accepted by Thrasymachus himself. But Socrates is not disposed to quarrel about words, if, as he significantly insinuates, his adversary has changed his mind. In what follows Thrasymachus does in fact withdraw his admission that the ruler may make a mistake, for he affirms that the ruler as a ruler is infallible. Socrates is quite ready to accept the new position, which he equally turns against Thrasymachus by the help of the analogy of the arts. Every art or science has an interest, but this interest is to be distinguished from the accidental interest of the artist, and is only concerned with the good of the things or persons which come under the art. And justice has an interest which is the interest not of the ruler or judge, but of those who come under his sway.
Thrasymachus is on the brink of the inevitable conclusion, when he makes a bold diversion. ‘Tell me, Socrates,’ he says, ‘have you a nurse?’ What a question! Why do you ask? ‘Because, if you have, she neglects you and lets you go about drivelling, and has not even taught you to know the shepherd from the sheep. For you fancy that shepherds and rulers never think of their own interest, but only of their sheep or subjects, whereas the truth is that they fatten them for their use, sheep and subjects alike. And experience proves that in every relation of life the just man is the loser and the unjust the gainer, especially where injustice is on the grand scale, which is quite another thing from the petty rogueries of swindlers and burglars and robbers of temples. The language of men proves this—our ‘gracious’ and ‘blessed’ tyrant and the like—all which tends to show (1) that justice is the interest of the stronger; and (2) that injustice is more profitable and also stronger than justice.’
Thrasymachus, who is better at a speech than at a close argument, having deluged the company with words, has a mind to escape. But the others will not let him go, and Socrates adds a humble but earnest request that he will not desert them at such a crisis of their fate. ‘And what can I do more for you?’ he says; ‘would you have me put the words bodily into your souls?’ God forbid! replies Socrates; but we want you to be consistent in the use of terms, and not to employ ‘physician’ in an exact sense, and then again ‘shepherd’ or ‘ruler’ in an inexact,—if the words are strictly taken, the ruler and the shepherd look only to the good of their people or flocks and not to their own: whereas you insist that rulers are solely actuated by love of office. ‘No doubt about it,’ replies Thrasymachus. Then why are they paid? Is not the reason, that their interest is not comprehended in their art, and is therefore the concern of another art, the art of pay, which is common to the arts in general, and therefore not identical with any one of them? Nor would any man be a ruler unless he were induced by the hope of reward or the fear of punishment;—the reward is money or honour, the punishment is the necessity of being ruled by a man worse than himself. And if a State (or Church) were composed entirely of good men, they would be affected by the last motive only; and there would be as much ‘nolo episcopari’ as there is at present of the opposite…
The satire on existing governments is heightened by the simple and apparently incidental manner in which the last remark is introduced. There is a similar irony in the argument that the governors of mankind do not like being in office, and that therefore they demand pay.
…Enough of this: the other assertion of Thrasymachus is far more important—that the unjust life is more gainful than the just. Now, as you and I, Glaucon, are not convinced by him, we must reply to him; but if we try to compare their respective gains we shall want a judge to decide for us; we had better therefore proceed by making mutual admissions of the truth to one another.
Thrasymachus had asserted that perfect injustice was more gainful than perfect justice, and after a little hesitation he is induced by Socrates to admit the still greater paradox that injustice is virtue and justice vice. Socrates praises his frankness, and assumes the attitude of one whose only wish is to understand the meaning of his opponents. At the same time he is weaving a net in which Thrasymachus is finally enclosed. The admission is elicited from him that the just man seeks to gain an advantage over the unjust only, but not over the just, while the unjust would gain an advantage over either. Socrates, in order to test this statement, employs once more the favourite analogy of the arts. The musician, doctor, skilled artist of any sort, does not seek to gain more than the skilled, but only more than the unskilled (that is to say, he works up to a rule, standard, law, and does not exceed it), whereas the unskilled makes random efforts at excess. Thus the skilled falls on the side of the good, and the unskilled on the side of the evil, and the just is the skilled, and the unjust is the unskilled.
There was great difficulty in bringing Thrasymachus to the point; the day was hot and he was streaming with perspiration, and for the first time in his life he was seen to blush. But his other thesis that injustice was stronger than justice has not yet been refuted, and Socrates now proceeds to the consideration of this, which, with the assistance of Thrasymachus, he hopes to clear up; the latter is at first churlish, but in the judicious hands of Socrates is soon restored to good-humour: Is there not honour among thieves? Is not the strength of injustice only a remnant of justice? Is not absolute injustice absolute weakness also? A house that is divided against itself cannot stand; two men who quarrel detract from one another’s strength, and he who is at war with himself is the enemy of himself and the gods. Not wickedness therefore, but semi-wickedness flourishes in states,—a remnant of good is needed in order to make union in action possible,—there is no kingdom of evil in this world.
Another question has not been answered: Is the just or the unjust the happier? To this we reply, that every art has an end and an excellence or virtue by which the end is accomplished. And is not the end of the soul happiness, and justice the excellence of the soul by which happiness is attained? Justice and happiness being thus shown to be inseparable, the question whether the just or the unjust is the happier has disappeared.
Thrasymachus replies: ‘Let this be your entertainment, Socrates, at the festival of Bendis.’ Yes; and a very good entertainment with which your kindness has supplied me, now that you have left off scolding. And yet not a good entertainment—but that was my own fault, for I tasted of too many things. First of all the nature of justice was the subject of our enquiry, and then whether justice is virtue and wisdom, or evil and folly; and then the comparative advantages of just and unjust: and the sum of all is that I know not what justice is; how then shall I know whether the just is happy or not?…
Thus the sophistical fabric has been demolished, chiefly by appealing to the analogy of the arts. ‘Justice is like the arts (1) in having no external interest, and (2) in not aiming at excess, and (3) justice is to happiness what the implement of the workman is to his work.’ At this the modern reader is apt to stumble, because he forgets that Plato is writing in an age when the arts and the virtues, like the moral and intellectual faculties, were still undistinguished. Among early enquirers into the nature of human action the arts helped to fill up the void of speculation; and at first the comparison of the arts and the virtues was not perceived by them to be fallacious. They only saw the points of agreement in them and not the points of difference. Virtue, like art, must take means to an end; good manners are both an art and a virtue; character is naturally described under the image of
