This is already proved historically by the fact that the idea of love was by no means first introduced into the consciousness of mankind with and by Christianity,--is by no means peculiarly Christian. The horrors of the Roman Empire present themselves with striking significance in company with the appearance of this idea. The empire of policy which united men after a manner corresponding with its own idea, was coming to its necessary end. Political unity is a unity of force. The despotism of Rome must turn in upon itself, destroy itself. But it was precisely through this catastrophe of political existence that man released himself entirely from the heart-stifling toils of politics. In the place of Rome appeared the idea of humanity; to the idea of dominion succeeded the idea of love. Even the Jews, by imbibing the principle of humanity contained in Greek culture, had by this time mollified their malignant religious separatism. Philo celebrates love as the highest virtue. The extinction of national differences lay in the idea of humanity itself. Thinking minds had very early overstepped the civil and political separation of man from man. Aristotle distinguishes the man from the slave, and places the slave, as a man, on a level with his master, uniting them in friendship. Epictetus, the slave, was a Stoic; Antoninus, the emperor, was a Stoic also: thus did philosophy unite men. The Stoics taught [221] that man was not born for his own sake, but for the sake of others, i.e., for love: a principle which implies infinitely more than the celebrated dictum of the Emperor Antoninus, which enjoined the love of enemies. The practical principle of the Stoics is so far the principle of love. The world is to them one city, men its citizens. Seneca, in the sublimest sayings, extols love, clemency, humanity, especially towards slaves. Thus political rigour and patriotic narrowness were on the wane. Christianity was a peculiar manifestation of these human tendencies;--a popular, consequently a religious, and certainly a most intense manifestation of this new principle of love. That which elsewhere made itself apparent in the process of culture, expressed itself here as religious feeling, as a matter of faith. Christianity thus reduced a general unity to a particular one, it made love collateral to faith; and by this means it placed itself in contradiction with universal love. The unity was not referred to its true origin. National differences indeed disappeared; but in their place difference of faith, the opposition of Christian and un-Christian, more vehement than a national antagonism, and also more malignant, made its appearance in history.