Herodotus was of opinion that the Greeks derived their religion and superstition from the Egyptians; Plutarch arrived at another conclusion; while many maintained that Orpheus brought the mysteries of religion into Greece. Whoever is right, this we know, that the Greeks became so prone to worship ancient deities, and so anxious to do homage to all the divinities, that they erected altars to unknown gods, for fear they would fail in their duty to any power that could assist them in time of need. Above all gods, Jupiter was held in the highest esteem. He was regarded as the president of law and justice, as the protector of cities, as governor and director of their councils, and as chief of their societies. To him they ascribed thunder, and supposed it was he who delivered them from the Persians, and who assisted them to buy and sell to advantage. They erected altars to him in the courts of their houses and before their gates. Regarding him as the god of strangers, they received and entertained visitors with great ceremony. As a sign of fidelity, the right hand of fellowship was given to a stranger, to whom salt was presented, in token that his person would be safe under the entertainer's roof. A stranger's bottle was kept, and when a visitor arrived at the door the head of the family and he joined feet together on the threshold. A cup of wine was drunk to an unknown person before his name was asked. To return respect to those in the house, the stranger did reverence to the genius of the place, and saluted the ground with a kiss. When one sojourned in a strange land, he was expected to conform to the recognised customs thereof; and on taking his departure he not only bade farewell to those with whom he had become acquainted, but took leave of their deities. When an important agreement was entered into, Jupiter was sacrificed to, and called to witness the covenant. The Greeks purified themselves after frightful dreams; they wore charmed rings to protect themselves from witchcraft; they were accustomed to spit three times on seeing a madman; and they spat every time the devil's name was mentioned in their hearing. Stones were cast at every cat and weasel met by one when commencing a journey, and the meeting of a bitch with whelps was carefully avoided. The crowing of hens and the whistling of maidens were listened to with as great fear as the hissing of a serpent.