The process of obtaining fire by friction is represented by a nobler class of myths than that referred to. In the Mahábhárata the gods and demons together churn the ocean for the nectar of immortality; and they use for their churning-stick the mountain Manthara. This word appears in pramantha, which means a fire-drill, and from it comes the great name of Prometheus, who stole fire from heaven, and conferred on mankind a boon which rendered them so powerful that the jealousy and wrath of Zeus were excited. This fable is generally read in its highly rationalised and mystical form, and on this account belongs to another part of our general subject; but it may be remarked here that the Titan so terribly tortured by Zeus could hardly have been regarded, originally, as the friend of man. At the time when Zeus was a god genuinely worshipped--when he first stood forth as the supplanter of the malign devourer Saturn--it could have been no friend of man who was seen chained on the rock for ever to be the vulture's prey. It was fire in some destructive form which must have been then associated with Prometheus, and not that power by which later myths represented his animating with a divine spark the man of clay. The Hindu myth of churning the ocean for the immortal draught, even if it be proved that the ocean is heaven and the draught lightning, does not help us much. The traditional association of Prometheus with the Arts might almost lead one to imagine that the early use of fire by some primitive inventor had brought upon him the wrath of his mates, and that Zeus' thunderbolts represented some early 'strike' against machinery. It is not quite certain that it may not have been through some euphemistic process that Fire-worship arose in Persia. Not only does fire occupy a prominent place in the tortures inflicted by Ahriman in the primitive Parsee Inferno, but it was one of the weapons by which he attempted to destroy the heavenly child Zoroaster. The evil magicians kindled a fire in the desert and threw the child on it; but his mother, Dogdo, found him sleeping tranquilly on the flames, which were as a pleasant bath, and his face shining like Zohore and Moschteri (Jupiter and Mercury). [31] The Zoroastrians also held that the earth would ultimately be destroyed by fire; its metals and minerals, ignited by a comet, would form streams which all souls would have to pass through: they would be pleasant to the righteous, but terrible to the sinful,--who, however, would come through, purified, into paradise, the last to arrive being Ahriman himself. The combustible nature of many minerals under the surface of the earth,--which was all the realm of Hades (invisible),--would assist the notion of a fiery abode for the infernal gods. Our phrase 'plutonic rock' would then have a very prosaic sense. Pliny says that in his time sulphur was used to keep off evil spirits, and it is not impossible that it first came to be used as a medicine by this route. [32]