At Mathura in Gokala Krishna grew up unknown among poor herdsmen. While yet in his cradle he had betrayed his divine origin by strangling, like Hercules, a dreadful snake which crawled upon him. He causes astonishment to every one by his precosity and lofty wisdom. As he grows up he becomes the darling of the herdsmen and playmate of Gopias, the milkmaid; he performs the most astonishing miracles. When, however, the time had come he arose and slew Kansa. He then fought the frightful "Time Snake" Kaliyanaga, of the thousand heads (the Hydra in the myth of Hercules, the Python in that of Apollo), which poisoned the surrounding air with its pestilential breath; and he busied himself in word and deed as a protector of the poor and proclaimer of the most perfect teaching. His greatest act, however, was his descent into the Underworld. Here he overpowered Yama, the dark God of death, obtained from him a recognition of his divine power, and led back the dead with him to a new life. Thus he was a benefactor of mankind by his heroic strength and miraculous power, leading the purest life, healing the sick, bringing the dead back to life, disclosing the secrets of the world, and withal humbly condescending to wash the feet of the Brahmins. Krishna finally died of an arrow wound which he sustained accidentally and in an unforeseen manner on his heel--the only vulnerable part of his body (cf. Achilles, Balder, Adonis, and Osiris). While dying he delivered the prophecy that thirty-six years after his death the fourth Epoch of the World, Caliyuga, the Iron Age, would begin, in which men would be both unhappy and wicked. But according to Brahmin teaching Krishna will return at the end of all time, when bodily and moral need will have reached its highest pitch upon the earth. In the clouds of heaven he will appear upon his white steed. With a comet in his right hand as a sword of flame he will destroy the old earth by fire, founding a new earth and a new heaven, and establishing a golden age of purity and perfection in which there will be nothing but pure joy and blessedness.