1. Development of Plato’s Theory of the Good. Plato betrays his ascetic tendency in his first drafting of the Ideas and, as we have said, the double-world theory is the cause of this. Only one of the two worlds is real and will appeal to the Wise Man. The soul belongs to the supersensible world, and the knowledge, of which virtue consists, takes man away from the sensible world. Since earthly life is full of evil, the soul should die to it and turn away as soon as possible to the divine presence. This ascetic aspect of morality is set forth in the Phædo and the Theætetus.
In the general development of his metaphysics in the second drafting of his Ideas, Plato’s ethical theory developed also. He not only went beyond the abstract statement of Socrates, but beyond his own original asceticism. When he brought his two worlds into teleological relationship, he was logically compelled to abandon his conception of ascetic morals. The physical world has now a relative reality, and by the same sign sense-life has a relative moral value. It was Plato’s firm conviction that moral conduct makes man truly blessed, in this and another world. He still held, too, that this blessedness, this complete perfection of the soul, this sharing in the divine world of the Ideas, is the Highest Good. Yet he now came to recognize other kinds of happiness as steps toward the ideal Good. There are varieties of Goods, as appeared in his doctrine of Love. Besides the intuition of knowledge and its pleasures, there are physical Goods and their pleasures. Intellectual pleasure may be unmixed with pain, but there are also sensuous pleasures unmixed with pain. Here is indeed Plato, the Greek, speaking; Plato, the Greek artist, impelled by the charm of the Greek world around him. Strongly as he combated the Cyrenaic hedonism, and closely as he was allied to Socrates, his Greek nature gave way before the manifestations of the Idea of the Good in the physical world. The pleasure in nature objects, in educational development, in the practical and plastic arts, in mathematical sciences, and in the orderliness of life—all these became for him preliminary stages in the full participation in the ethical Good. They came to have for him a relative value, as expressed in the Philebus, Republic, and Symposium.
2. The Four Cardinal Virtues. But Plato wentfarther, and was not content merely to point out the place of human conduct in the twofold world. He developed his theory of ethics systematically. He classified the virtues on the basis of his threefold division of the soul. Naturally enough, in his first draft of his theory, Plato followed Socrates in reducing the single virtues to one, viz., the virtue of knowledge. In his second drafting, however, in the later dialogues, he assumed their distinct independence, and he reflected upon their respective spheres. A virtue corresponds to each part of the soul. Each part has its own perfection, which is its virtue. Moreover, in so far as one or another part of the soul preponderates in different men, so far are they suited to developing the corresponding virtue.
| Soul (Justice) |  | Rational nature—in brain (Wisdom) | ||
| Irrational nature | | Noble part—in heart (Courage) | ||
| Ignoble part—in liver (Temperance) | ||||
From the above scheme it will be observed that the rational nature has the brain as its organ and reaches its perfection or virtue in Wisdom; that the ignoble irrational nature has the liver as its organ, and reaches its virtue in self-control or Temperance. Finally, since the perfection of the whole soul consists in the orderly relation of its single parts, so subordinated and regulated that the soul can reach its highest perfection, the fourth and highest virtue is Justice. The four cardinal virtues are Temperance, Courage, Wisdom, and Justice.
3. Plato’s Theory of Political Society. The virtue, Justice, has little meaning in individual ethics, and as an ethical perfection can only be attained in society.There is no English word that is quite the equivalent for the Greek term, but Justice is the usual translation. Justice, however, does not contain the moral spirit of the Greek word. Consistent with his conception of the Ideas in his metaphysics, Plato’s ideal of moral perfection is to be found, not in the individual, but in the species. Plato pictures less the perfect man than the perfect society. Perfect happiness is rather that of the social whole than of the individual, and this ideal of happiness can be reached only in the ideal State. That is why the dialogue, the Republic, occupies so important a place in Plato’s writings. It is an attempt to show how the fourth and last virtue, Justice, can be attained. The first book was written in Plato’s early period, and was perhaps called a “dialogue concerning Justice.” Justice is distinctly the social virtue found only in a perfect society, and it will make possible the fulfillment of Wisdom, Courage, and Temperance. The individual man is a vital being whose heart is the central organ, whose characteristic virtue is courage. His courage is indeed a combination of wisdom and temperance. The picture is of the individual man, not amenable to society, but in “a state of warfare.” In such isolation Justice would not exist as a virtue.
The political state is necessary if the Idea of the Good is to be manifested in human life. The state is the true educator in Justice, and at the same time the ideal state will be the realization of Justice. The task of the state everywhere is the same, to wit, to direct the common life of man so that every one may be happy through virtue. The result may be attained only by so ordering the relations of society that Justice may prevail. Plato’s Republic is a carefully worked-out planof such an ideal society. The author made several attempts at Syracuse with the aid of Dion to get first the elder and then the younger Dionysius to transform the tyranny into an ideal state. These attempts resulted disastrously. In the disappointment of his old age that his ideal scheme had never succeeded, he wrote the Laws, which is a revised version of the Republic with the Pythagorean number theory as a basis.
The Spartan state is his model. The Platonic Republic is aristocratic. There is paternal government in everything, censorship of everything. Each individual’s course is marked out for him. When Greek political life was undergoing dissolution, Plato raised the ideal of political unity as necessary to individual happiness as against the anarchism of segregation. Yet even in this he was reflecting the current distrust of political institutions. The comparison of existing political conditions with his own political ideal reinforced his aristocratic leanings, and made him the more distrustful of the political possibilities of a democracy. He believed that an intelligently worked out scheme of government was practicable, and should be forced upon people, if necessary. In no other way was political salvation possible.
Since the State is the man “writ large,” it has three parts, corresponding to the three parts of the human soul. There is (1) the working or peasant class, which corresponds to the appetitive part of man; the only object of such a class is to furnish food for the State, and the highest virtue of this class is temperance. The peasant can only work, eat, and drink, and the highest praise of him is that he controls his appetites. (2) The warrior class guards the State within and without; and its characteristic virtue is courage. The will must show its highestefficiency in guidance of the emotions. (3) Highest of all is the cultured class of philosophers or rulers, who determine by their insight the laws that should rule the State. The virtue of this class is wisdom, for is this class not the brain of the State? The perfection of the entire State exists when the three classes have their proper distribution of power. Then does justice exist. The duty of the rulers is therefore to have the highest wisdom possible, of the warriors to be unflinching in their devotion to duty, of the peasants to exercise self-control. Thus Plato’s Republic is an aristocracy in the hands of the carefully cultured, which consists of the two upper classes. By means of community of wives, the exposure of deformed infants, and the State’s education of the children of the two upper classes, a continuous selection can be made, the two upper classes can be renewed, and all private ends can be renounced in favor of the State. Thus the sole end of a community is moral education, and Plato arranges his ideal community with reference to that. The two upper classes are a great family, to whom this is intrusted. They have dedicated their lives to the furthering of science and to its administration.
A SELECTION OF PASSAGES FROM PLATO FOR ENGLISH READERS.