Many moderns have insisted on the smallness of that Mediterranean world; and the wider horizons that might have awaited it with the discovery of the other continents. But this is an illusion; one of the many illusions of materialism. The limits that paganism had reached in Europe were the limits of human existence; at its best it had only reached the same limits anywhere else. The Roman stoics did not need any Chinamen to teach them stoicism. The Pythagoreans did not need any Hindus to teach them about recurrence or the simple life or the beauty of being a vegetarian. In so far as they could get these things from the East, they had already got rather too much of them from the East. The Syncretists were as convinced as Theosophists that all religions are really the same. And how else could they have extended philosophy merely by extending geography? It can hardly be proposed that they should learn a purer religion from the Aztecs or sit at the feet of the Incas of Peru. All the rest of the world was a welter of barbarism. It is essential to recognise that the Roman Empire was recognised as the highest achievement of the human race; and also as the broadest. A dreadful secret seemed to be written as in obscure hieroglyphics across those mighty works of marble and stone, those colossal amphitheatres and aqueducts. Man could do no more. For it was not the message blazed on the Babylonian wall, that one king was found wanting or his one kingdom given to a stranger. It was no such good news as the news of invasion and conquest. There was nothing left that could conquer Rome; but there was also nothing left that could improve it. It was the strongest thing that was growing weak. It was the best thing that was going to the bad. It is necessary to insist again and again that many civilisations had met in one civilisation of the Mediterranean sea; that it was already universal with a stale and sterile universality. The peoples had pooled their resources and still there was not enough. The empires had gone into partnership and they were still bankrupt. No philosopher who was really philosophical could think anything except that, in that central sea, the wave of the world had risen to its highest, seeming to touch the stars. But the wave was already stooping; for it was only the wave of the world.