Socrates himself represents a complete individuality, hence his method of education has been of service to individualities the most dissimilar. What contrasting types do we find in Xenophon, the bigoted and stupid cavalry officer; and Plato, the witty and profound thinker; the cynic Antisthenes full of the pride of beggary, and the frivolous courtier Aristippus! They all portrayed themselves rather than their master in their writings, and yet each one of them has in some way or other his part in him. Of all these disciples of Socrates, two only have influenced the afterworld, Antisthenes and Plato, Athenians both, the former a plebeian and founder of the philosophy of the proletariat, the latter, sprung from an old and noble family, an aristocrat of the purest water in all his philosophic ideas. Antisthenes carried the practical and matter-of-fact temper of his master to extremes. Virtue with him is a question of character, and therefore scorns empty words and learning. Logic and mathematics are superfluous, virtue is the only good, vice the only evil; everything else is a matter of indifference. This meagreness of theory is made good by strength of will. Force of character, freedom from the prejudices of conventional custom, conventional religion or conventional government--these are what distinguish the true freeman, the man free in soul, from the slave. The impression produced by this king in rags in the midst of that age of decadence was striking beyond belief. He with his barking voice seemed to be the warning cry of the proletarian admonishing men to return to nature and to simplicity of life. His acute and witty writings were gladly read. His school, which can show one disciple of world-wide celebrity in the person of Diogenes, was gradually merged into the Stoa, which owes to Cynicism the popular tone of its influential system of ethics. Since the birth of Christ, the Cynic has come to life again, as of old in the guise of the mendicant preacher, proclaiming the gospel of renunciation and holding up the mirror to the corruption of the age. This new Cynicism was one of the most important precursors of the Christian apostolate. It awoke once more in the age of the Renaissance, finding its wittiest exponent in Montaigne, in whose steps J. J. Rousseau afterwards trod. In him we have the best typical example of the strength and weakness of this anti-scientific movement. Plato, the antithesis of Antisthenes, continued in a direct line the thread of Athenian philosophy. He accomplished, in the widest sense of the term, the task which Socrates had only begun--that of establishing science, now discredited by the Sophist, on a new basis.