[46] Aristot. Ethic. Nikom. i. 5, p. 1095 b, 1096 a, x. 6-9, pp. 1176-1179.

Nor indeed is Plato’s conclusion proved, even in his own sense of the words. He identifies the just man with the philosopher or man of reason — the unjust man with the pursuer of power or wealth. Now, even in this Platonic meaning, the just man or philosopher cannot be called happy quand même: he requires, as one condition of his happiness, a certain amount of service, forbearance, and estimation, on the part of his fellows. He is not completely self-sufficing, nor can any human being be so.

Exaggerated parallelism between the Commonwealth and the individual man.

The confusion, into which Plato has here fallen, arises mainly from his exaggerated application of the analogy between the Commonwealth and the Individual: from his anxiety to find in the individual something like what he notes as justice in the Commonwealth: from his assimilating the mental attributes of each individual, divisible only in logical abstraction, — to the really distinct individual citizens whose association forms the Commonwealth.[47] It is only by a poetical or rhetorical metaphor that you can speak of the several departments of a man’s mind, as if they were distinct persons, capable of behaving well or ill towards each other. A single man, considered without any reference to others, cannot be either just or unjust. “The just man” (observes Aristotle, in another line of argument), “requires others, towards whom and with whom he may behave justly.”[48] Even when we talk by metaphor of a man being just towards himself, reference to others is always implied, as a standard with which comparison is taken.

[47] Plato, Republic, i. pp. 351 C, 352 C. οὐ γὰρ ἂν ἀπείχοντο ἀλλήλων κομιδῇ ὄντες ἄδικοι, ἀλλὰ δῆλον ὅτι ἐνῆν τις αὐτοῖς δικαιοσύνη, ἣ αὐτοὺς ἐποίει μή τοι καὶ ἀλλήλους γε καὶ ἐφ’ οὓς ᾔεσαν ἅμα ἀδικεῖν, δι’ ἣν ἔπραξαν ἃ ἔπραξαν, ὥρμησαν δὲ ἐπὶ τὰ ἄδικα ἀδικίᾳ ἡμιμόχθηροι ὄντες, &c.

We find the same sentiment in the Opera et Dies of Hesiod, 275, contrasting human society with animal life:—

ἴχθυσι μὲν καὶ θηρσὶ καὶ οἰωνοῖς πετεήνοις
ἔσθειν ἀλλήλους, ἐπεὶ οὐ δίκη ἐστὶν ἐν αὐτοῖς·
ἀνθρώποισι δ’ ἔδωκε (Ζεὺς) δίκην, ἣ πολλὸν ἀρίστη
γίνεται.

[48] Aristotel. Ethic. Nikomach. x. 7. ὁ δίκαιος δεῖται πρὸς οὓς δικαιοπραγήσει, καὶ μεθ’ ὧν.

Second Argument of Plato to prove the happiness of the just man — He now recalls his previous concession, and assumes that the just man will receive just treatment and esteem from others.

In the main purpose of the Republic, therefore — to prove that the just man is happy in his justice, and the unjust miserable in his injustice, whatever supposition may be made as to consequent esteem or treatment from Gods or men — we cannot pronounce Plato to have succeeded. He himself indeed speaks with triumphant confidence of his own demonstration. Yet we find him at the close of the dialogue admitting that he had undertaken the defence of a position unnecessarily difficult. “I conceded to you” (he says) “for argument’s sake that the just man should be accounted unjust, by Gods as well as men, and that the unjust man should be accounted just. But this is a concession which I am not called upon to make; for the real fact will be otherwise. I now compare the happiness of each, assuming that each has the reputation and the treatment which he merits from others. Under this supposition, the superior happiness of the just man over the unjust, is still more manifest and undeniable.”[49]