This was essentially an Indian myth--or perhaps an Indian and Iranian--and took the place of the myth of the sea journey, as it was conceived by Greeks and Germans. The Indians and Iranians had never a sea of death, so they could not have such ferrymen as the Phæaceans, or legends such as the voyages of Odysseus and the burning of Baldur. In the place of them, and with their mortal _river_, they adopted this Bridge of Souls. The guardians are manifold in their nature; for their names show them related both to Cerberus, who guards Hades, and to Hermes, who leads the souls of the dead below; and, so far as we can gather from the Vedas, these dogs of Yama discharged both offices, sometimes keeping the bridge and sometimes conducting souls along it. "Give him," says the prayer, "O Yama, to the two dogs." No doubt their terrors were for the wicked only, and they are thus apt images of death:-- "Death comes to set thee free; Oh, meet him cheerily As thy true friend."[33] Still, as we see from their appearance, the dreadful aspect of death predominates. In like forms, as dogs or wolves, they return time out of mind in Norse mythology and in Middle-Age legend. It has been said that this myth of the Bridge of Souls was essentially Indian and Iranian (old Persian). It is often most difficult to ascertain what were the ancient Persian beliefs: but in this case the myth has been handed down to us from the Persians through the Arabs, a people possessing of right no part or lot in its construction. It is generally acknowledged that Mohammed took from the Persians that famous bridge so vividly described in the Korân.[34] Es-Sirât is the bridge's name. It is finer than a hair and sharper than the edge of a sword, and is, besides, guarded with thorns and briars along all its length. Nevertheless, when, at the last day, the good Muslim comes to cross it, a light will shine upon him from heaven, and he will be snatched across like lightning or like the wind; but when the wicked man or the unbeliever approaches, the light will be hidden, and, from the extreme narrowness of the bridge and likewise becoming entangled in the thorns, he will fall headlong into the abyss of fire that is beneath. This is the fragment of our old Aryan mythology which the Mohammedan has taken to himself to form an image of hell and of punishment after death. It is significant that from the Persians should have been inherited the most gloomy myth concerning the Bridge of Souls. For from the same source we (Christians) gain our fearfullest notions of the Devil. The bridge cannot be always the Milky-way. In at least one Sanskrit hymn we learn-- "Upon it, they say, there are colours, white, and blue, and brown, and gold, and red. "And this path Brahma knows, and he who has known Brahma shall take it; he who is pure and glorious."