Virtue, with the earlier Greek philosophers, was aristocratic and exclusive. Stoicism, like Christianity, threw it open to the meanest of mankind. In the kingdom of wisdom, as in the kingdom of Christ, there was neither barbarian, Scythian, bond, nor free. The only true freedom was to serve philosophy, or, which was the same thing, to serve God; and that could be done in any station in life. The sole condition of communion with gods and good men was the possession of a certain frame of mind, which might belong equally to a gentleman, to a freedman, or to a slave. In place of the arrogant assertion of the natural nobility of the Greeks, we now hear that a good mind is the true nobility. Birth is of no importance; all are sprung from the gods. "The door of virtue is shut to no man; it is open to all, admits all, invites all--free men, freedmen, slaves, kings and exiles. Its election is not of family or fortune; it is content with the bare man." Wherever there was a human being, there Stoicism saw a field for well doing. Its followers were always to have in their mouths and hearts the well-known line-- Homo sum humani nihil a me allenum puto Closely connected with the humanitarianism of the Greeks is their cosmopolitanism. Cosmopolitanism is a word which has contracted rather than expanded in meaning with the advance of time. We mean by it freedom from the shackles of nationality. The Stoics meant this and more. The city of which they claimed to be citizens was not merely this round world on which we dwell, but the universe at large with all the mighty life therein contained. In this city, the greatest of earth's cities--Rome, Ephesus or Alexandria, were but houses. To be exiled from one of them was only like changing your lodgings, and death but a removal from one quarter to another. The freemen of this city were all rational beings--sages on earth and the stars in heaven. Such an idea was thoroughly in keeping with the soaring genius of Stoicism. It was proclaimed by Zeno in his Republic, and after him by Chrysippus and his followers. It caught the imagination of alien writers as of the author of the Peripatetic _De Mundo_ who was possibly of Jewish origin and of Philo and St Paul who were certainly so. Cicero does not fail to make of it on behalf of the Stoics; Seneca revels in it; Epictetus employs it for edification and Maucus Aurelius finds solace in his heavenly citizenship for the cares of an earthly ruler--as Antoninus indeed his city is Rome, but as a man it is the universe.