Such was the credulity of the Roman people, that the most improbable and impossible stories, mere rumors born of lying imposture, were heard and believed. "Idols shed tears or sweated blood, oxen spoke, men were changed into women, cocks into hens, lakes or brooks ran with blood or milk, mice nibbled at the golden vessels of the temples, a swarm of bees lighted on a temple or in a public place." All such alleged occurrences required sacrifices and expiatory rites to conquer the fury and regain the favor of the gods. _Fall of the Early Roman Religion._--At the beginning of the Christian era, the old Roman religion, founded upon the institutions of Numa, had almost come to an end. The invasion of Italy by the Greek gods was the first serious assault upon the early Roman faith. The elegant refinement and fascinating influence of Greek literature, philosophy and sculpture, had incrusted with a gorgeous coating the rude forms of the primitive Roman worship. But, as time advanced, the old gods grew stale and new deities were sought. The human soul could not forever feed upon myths, however brilliant and bewitching. The mysterious and melancholy rites of Isis came to establish themselves by the side of those of Janus and Æsculapius. The somber qualities of the Egyptian worship seemed to commend it. Even so good and grand a man as Marcus Aurelius avowed himself an adorer of Serapis; and, during a sojourn in Egypt, he is reported to have conducted himself like an Egyptian citizen and philosopher while strolling through the temples and sacred groves on the banks of the Nile.[142]