The process of manufacturing a god from a dead man, although at first sight apparently less involved than that of the evolution of a deity through fetishistic or totemic media, is found on close examination to be even more complex. Among many primitive races, and some that are not primitive, it is the bounden duty of the dead man's son to see that his _manes_, his spirit, wants for nothing. Even as he cherished his son during the first years of the infant's life, so his heir is now bound by all he holds sacred to cherish his ghost and guard it against hunger, thirst, and cold. Woe betide the unfilial wretch who neglected the tomb of his father! Among the Egyptians, Assyrians, and Chinese such a dereliction of duty was regarded with the utmost abhorrence. Dreadful was the lot of the uncared-for dead. Says the Gilgamesh epic, the greatest literary product of ancient Babylonia:

The man whose spirit has none to care for it-- Thou and I have often seen such an one-- The dregs of the vessel, the leavings of the feast, And that which is cast out upon the street are his food.

An Introduction to Mythology — Part 74

Great care was bestowed by Egyptian sons upon the _post-mortem_ welfare of their parents, and the most solemn duty of a Chinaman is that of tending the spirits of his dead forefathers. This attention in course of time evolves into a very deep reverence, which greatly exalts the dead in the estimation of their descendants. In India and elsewhere critical observers have watched the progress of the evolution into godhead of innumerable dead men. A holy ascetic dies, famous throughout the neighbourhood for his piety and the rigour of his life. Miracles occur at his shrine. His surviving relatives foster the cult of his fame. His human "personality becomes misty, his origin grows mysterious, his career takes a legendary hue, his birth and death were both supernatural; in the next generation the names of the elder gods get introduced into the story, and so the marvellous tradition works itself into a myth, until nothing but a personal incarnation can account for such a series of prodigies. The man was an avatar of Vishnu or Siva; his supreme apotheosis is now complete, and the Brahmins feel warranted in providing for him a niche in the orthodox pantheon."[3]

An Introduction to Mythology — Part 74