In post-pagan convulsions there was much that was very vile. But there is one aspect of evil which subsequent barbarism reproved, and in which Rome delighted. It was the symbolized shapes of sin, open and public, for which in modern speech there is no name, and which were then omnipresent, sung in verse, exhibited on the stage, paraded in the streets, put on the amulets that girls and matrons wore, put in the nursery, consecrated by custom, art, religion, and since recovered from disinterred Pompeii. "The mouth," said Quintillian, "does not dare describe what the eyes behold." Rome that had made _orbs_ and _urbs_ synonymous was being conquered by the turpitudes of the quelled. "I have told of the Prince," said Suetonius, "I will tell now of the Beast." It was his privilege. He wrote in Latin. In English it is not possible. Gautier declared that the inexpressible does not exist. Even his pen might have balked, had he tried it on the imperial orgy. The ulcer that ravaged Sylla, gangrened a throne, and decomposed a world. Less violent under Tiberius than under Caligula, under Nero the fever rose to the brain and added delirium to it. In reading accounts of the epoch you feel as though you were assisting at the spectacle of a gigantic asylum, from which the keepers are gone, and of which the inmates are omnipotent. But, in spite of the virulence of the virus, the athletic constitution of the empire, joined to its native element of might, resisted the disease so potently that one must assume that there was there a vitality which no other people had had, a hardiness that enabled Rome to survive excesses in which Nineveh and Babylon fainted. From the disease itself Rome might have recovered. It was the delirium that brought her down. That delirium, mounting always, increased under Commodus, heightened under Caracalla, and reached its crisis in Heliogabalus. Thereafter, for a while it waned only to flame again under Diocletian. The virus remained. To extirpate it the earth had to produce new races. Already they were on their way. Meanwhile, though there were reigns when, in the words of Tacitus, virtue was a sentence of death, the emperors were not always insane. Vespasian was a soldier, Hadrian a scholar, Pius Antoninus a philosopher, and Marcus Aurelius a sage. Rome was not wholly pandemoniac. There is goodness everywhere, even in evil. There was goodness even in Rome. Stoicism, a code of the highest morality, had been adopted by the polite. Cicero, in expounding it, had stated that no one could be a philosopher who has not learned that vice should be avoided, however concealable it may be. Aristotle had praised virtue because of its extreme utility. Seneca said that vices were maladies, among which Zeno catalogued love, as Plato did crime. To him, vice stood to virtue as disease does to health. All guilt, he said, is ignorance.