Ancient Physicians.

Galen, the physician, asserts that experience is the only source of knowledge; lays great stress on the culture of mathematics and logic, observing that he himself should have been a Pyrrhonist had it not been for geometry. In the teleological doctrine of physiology he considers that the foundations of a true theology must be laid. The physicians of the times exerted no little influence on the promotion of such views; for the most part they embraced the Pantheistic doctrine. As one of them, Sextus Empiricus may be mentioned; his works, still remaining, indicate to us the tendency of this school to materialism.

Philosophical atheism among the educated.

Such was the tone of thought among the cultivated Romans; and to this philosophical atheism among them was added an atheism of indifference among the vulgar. But, since man is so constituted that he cannot live for any length of time without a form of worship, it is evident that there was great danger, whenever events should be ripe for the appearance of some monotheistic idea, that it might come in a base aspect. At a much later period than that we are here considering, one of the emperors expressed himself to the effect that it would be necessary to give liberty for the exercise of a sound philosophy among the higher classes, and provide a gorgeous ceremonial for the lower; he saw how difficult it is, by mere statesmanship to co-ordinate two such requirements, in their very nature contradictory. Though polytheism had lost all intellectual strength, the nations who had so recently parted with it could not be expected to have ceased from all disposition to an animalization of religion and corporealization of God. In a certain sense the emperor was only a more remote and more majestic form of the conquered and vanished kings, but, like them, he was a man. There was danger that the theological system, thus changing with the political, would yield only expanded anthropomorphic conceptions.

Principles, to be effective, must coincide with existing tendencies.

History perpetually demonstrates that nations cannot be permanently modified except by principles or actions conspiring with their existing tendency. Violence perpetrated upon them may pass away, leaving, perhaps in a few generations, no vestige of itself. Even Victory is conquered by Time. Profound changes only ensue when the operating force is in unison with the temper of the age. International peace among so many people once in conflict—peace under the auspices of a great overshadowing power; the unity of sentiment and brotherhood of feeling fast finding its way around the Mediterranean shores; the interests of a vast growing commerce, unfettered through the absorption of so many little kingdoms into one great republic, were silently bringing things to a condition that political force could be given to any religious dogma founded upon sentiments of mutual regard and interest. Nor could it be otherwise than that among the great soldiers of those times one would at last arise whose practical intellect would discover the personal advantages that must accrue from putting himself in relation with the universally prevailing idea. How could he better find adherents from the centre to the remotest corner of the empire? And, even if his own personal intellectual state should disable him from accepting in its fulness the special form in which the idea had become embodied, could there be any doubt, if he received it, and was true to it as a politician, though he might decline it as a man, of the immense power it would yield him in return—a power sufficient, if the metropolis should resist, or be otherwise unsuited to his designs, to enable him to found a rival to her in a more congenial place, and leave her to herself, "the skeleton of so much glory and of so much guilt."

The coming Monotheism must be bounded by the limits of Roman influence.

Thus, after the event, we can plainly see that the final blow to Polytheism was the suppression of the ancient independent nationalities around the Mediterranean Sea; and that, in like manner, Monotheism was the result of the establishment of an imperial government in Rome. But the great statesmen of those times, who were at the general point of view, must have foreseen that, in whatever form the expected change came, its limits of definition would inevitably be those of the empire itself, and that wherever the language of Rome was understood the religion of Rome would prevail. In the course of ages, an expansion beyond those limits might ensue wherever the state of things was congenial. On the south, beyond the mere verge of Africa, nothing was to be hoped for—it is the country in which man lives in degradation and is happy. On the east there were great unsubdued and untouched monarchies, having their own types of civilization, and experiencing no want in a religious respect. But on the north there were nations who, though they were plunged in hideous barbarism, filthy in an equal degree in body and mind, polygamists, idolaters, drunkards out of their enemies' skulls, were yet capable of an illustrious career. For these there was a glorious participation in store.

The new ideas coalesce with the old.

Except the death of a nation, there is no event in human history more profoundly solemn than the passing away of an ancient religion, though religious ideas are transitory, and creeds succeed one another with a periodicity determined by the law of continuous variation of human thought. The intellectual epoch at which we have now arrived has for its essential characteristic such a change—the abandonment of a time-honoured but obsolete system, the acceptance of a new and living one; and, in the incipient stages, opinion succeeding opinion in a well-marked way, until at length, after a few centuries of fusion and solution, there crystallized on the remnant of Roman power, as on a nucleus, a definite form, which, slowly modifying itself into the Papacy, served the purposes of Europe for more than a thousand years throughout its age of Faith.