The other leaders of the Cyrenian school, Hegesias, Theodorus, Anniceris, we can here only name. The farther development of this school is wholly occupied in more closely defining the nature of pleasure, i. e. in determining whether it is to be apprehended as a momentary sensation, or as an enduring condition embracing the whole life; whether it belonged to the mind or the body, whether an isolated individual could possess it, or whether it is found alone in the social relations of life; whether we should regard it as positive or negative, (i. e. simply the absence of pain).
4. Euclid and the Megarians.—The union of the dialectical and the ethical is a common character in all the partial Socratic schools; the difference consists only in this, that in the one the ethical is made to do service to the dialectical, and that in the other, the dialectical stands in subjection to the ethical. The former is especially true of the Megarian school, whose essential peculiarity was pointed out by the ancients themselves as a combination of the Socratic and Eleatic principles. The idea of the good is on the ethical side the same as the idea of being on the physical; it was, therefore, only an application to ethics of the Eleatic view and method when Euclid called the good pure being, and the not-good, not-being. What is farther related of Euclid is obscure, and may here be omitted. The Megarian school was kept up under different leaders after his death, but without living force, and without the independent activity of an organic development. As hedonism (the philosophical doctrine of the Cyreneans that pleasure is the chief good) led the way to the doctrine of Epicurus, and cynicism was the bridge toward the Stoic, so the later Megaric development formed the transition point to scepticism. Directing its attention ever more exclusively towards the culture of the formal and logical method of argument, it left entirely out of view the moral thoughts of Socrates. Its sophistries and quiddities which were, for the most part, only plays of word and wit, were widely known and noted among the ancients.
5. Plato, as the complete Socraticist.—The attempts thus far to build upon the foundation pillars of the Socratic doctrine, started without a vigorous germinating principle, and ended fruitlessly. Plato was the only one of his scholars who has approached and represented the whole Socrates. Starting from the Socratic idea of knowledge he brought into one focus the scattered elements and rays of truth which could be collected from his master or from the philosophers preceding him, and gave to philosophy a systematic completeness. Socrates had affirmed the principle that conception is the true being and the only actual, and had urged to a knowledge according to the conception; but these positions were no farther developed. His philosophy is not yet a system, but is only the first impulse toward a philosophical development and method. Plato is the first who has approached a systematic representation and development of the ideal world of conceptions true in themselves.
The Platonic system is Socrates objectified, the blending and reconciling of preceding philosophy.
SECTION XIV.
PLATO.
I. Plato’s Life. 1. His Youth.—Plato, the son of Aristo, of a noble Athenian family, was born in the year 429 B. C. It was the year of the death of Pericles, the second year of the Peloponnesian war, so fatal to Athens. Born in the centre of Grecian culture and industry, and descended from an old and noble family, he received a corresponding education, although no farther tidings of this have been transmitted to us, than the insignificant names of his teachers. That the youth growing up under such circumstances should choose the seclusion of a philosophic life rather than a political career may seem strange, since many and favorable opportunities for the latter course lay open before him. Critias, one of the thirty tyrants, was the cousin of his mother, and Charmides, who subsequently, under the oligarchic rule at Athens, found his death at Thrasybulus on the same day with Critias, was his uncle. Notwithstanding this, he is never known to have appeared a single time as a public speaker in the assembly of the people. In view of the rising degeneracy and increasing political corruption of his native land, he was too proud to court for himself the favor of the many-headed Demos; and more attached to Doricism than to the democracy and practice of the Attic public life, he chose to make science his chief pursuit, rather than as a patriot to struggle in vain against unavoidable disaster, and become a martyr to his political opinions. He regarded the Athenian state as lost, and to hinder its inevitable ruin he would not bring a useless offering.
2. His Years of Discipline.—A youth of twenty, Plato came to Socrates, in whose intercourse he spent eight years. Besides a few doubtful anecdotes, nothing is known more particularly of this portion of his history. In Xenophon’s Memorabilia (III. 6) Plato is only once cursorily mentioned, but this in a way that indicates an intimate relation between the scholar and his master. Plato himself in his dialogues has transmitted nothing concerning his personal relations to Socrates; only once (Phæd. p. 59) he names himself among the intimate friends of Socrates. But the influence which Socrates exerted upon him, how he recognized in him the complete representation of a wise man, how he found not only in his doctrine but also in his life and action the most fruitful philosophic germs, the significance which the personal character of his master as an ideal type had for him—all this we learn with sufficient accuracy from his writings, where he places his own incomparably more developed philosophical system in the mouth of his master, whom he makes the centre of his dialogues and the leader of his discourses.
3. His Years of Travel.—After the death of Socrates 399 B. C, in the thirtieth year of his age, Plato, fearing lest he also should be met by the incoming reaction against philosophy, left, in company with other Socraticists, his native city, and betook himself to Euclid, his former fellow-scholar, the founder of the Megaric school (cf. § XIII. 4) at Megara. Up to this time a pure Socraticist, he became greatly animated and energized by his intercourse with the Megarians, among whom a peculiar philosophical direction, a modification of Socraticism, was already asserted. We shall see farther on the influence of this residence at Megara upon the foundation of his philosophy, and especially upon the elaboration and confirmation of his doctrine of Ideas. One whole period of his literary activity and an entire group of his dialogues, can only be satisfactorily explained by the intellectual stimulus gained at this place. From Megara, Plato visited Cyrene, Egypt, Magna-Grecia and Sicily. In Magna-Grecia he became acquainted with the Pythagorean philosophy, which was then in its highest bloom. His abode among the Pythagoreans had a marked effect upon him; as a man it made him more practical, and increased his zest for life and his interest in public life and social intercourse; as a philosopher it furnished him with a new incitement to science, and new motives to literary labor. The traces of the Pythagorean philosophy may be seen through all the last period of his literary life; especially his aversion to public and political life was greatly softened by his intercourse with the Pythagoreans. While in the Theatætus, he affirmed most positively the incompatibility of philosophy with public life, we find in his later dialogues, especially in the Republic and also in the Statesman—upon which Pythagoreanism seems already to have had an influence—a returning favor for the actual world, and the well-known sentence that the ruler must be a philosopher is an expression very characteristic of this change. His visit to Sicily gave him the acquaintance of the elder Dionysius and Dion his brother-in-law, but the philosopher and the tyrant had little in common. Plato is said to have incurred his displeasure to so high a degree, that his life was in danger. After about ten years spent in travel, he returned to Athens in the fortieth year of his age, (389 or 388 B. C.)