Socrates, the great teacher and the dramatic spokesman of Plato’s dialogues, gave the impulse to many philosophic systems. The only one we need to glance at now is that of the Cynics founded by Antisthenes, who had been one of Socrates’ many pupils. It was continued by the whimsical and notorious Diogenes of Sinope, whose name is familiar to us all. The founder of Cynicism emphasized the Socratic aim of individual virtue to the neglect of all else, for like his master he maintained that virtue was the only good, the sole aim in life, and that it was sufficient in itself for happiness. But he also went to the extreme of declaring that all external relations and obligations were to be neglected, and that there was no middle ground of the slightest importance between virtue and vice. Antisthenes also taught that whoever possessed virtue was wise, the rest of the world foolish; and that virtue was a thing which could be taught, and which once learned could never be lost. To the Cynic all pleasure was vicious, but sweat and toil blessings if associated with the individual freedom which was the aim of the school. Although the Cynics were concerned only with practical virtue in this world here and now, their puritanical and doctrinaire system deserves this place in our consideration, because it was the first to attempt to make philosophy a practical guide for the common man in everyday life. It is quite true that this was also Socrates’ position, but his mind and common sense took so large a view of the relations of man that he never fell into the narrow exclusiveness of the Cynics. With them philosophy was not speculative, but became the art of virtuous living; it easily degenerated into insolent and ostentatious show, and doubtless deserved many of the jibes which the later satirists threw at it. Within the sect, strictly speaking, the doctrine of virtue as man’s chief good came to little because it lacked the principle of moral activity. The will of man was not challenged to act in advancing him along the path of virtue. But Stoicism took over the doctrine, gave it life by insisting on the exercise of the will in the practice of virtue, and made thereby such a contribution to the practical life of virtue that we are still the Stoics’ heirs. It was toward the close of the fourth century that Zeno of Citium in the island of Cyprus established a school in the Painted Porch (Στοὰ ποικίλη) at Athens. Zeno had been an adherent of no one school or philosophical sect: he had listened to both Cynic, Megarian, and Platonic teachers. It was natural, therefore, in view of the training of the founder and of the fact that he was born in a place distant from the great centers of the Greek world, that the Stoic school from the beginning should draw its tenets from many sources and that it should have a cosmopolitan character.