Mana is the stuff through which magic works...proceeding immediately from the nature of the sacred person or thing, or mediately because a ghost or spirit has put it into the person or thing...The cult of the relics of the saints springs from the belief that their bodies, whether living or dead, possessed Mana.
Mana also ruled the underworld, which the Finns called Manana. The Romans knew her as a very ancient Goddess Mana or Mania, governing the underground land of the long dead; the ancestral spirits called manes, her children. They dwelt in a pit under the lapis manalis in the Forum, emerging to receive their offerings on the annual feast day of the Maniae. On this occasion the Goddess Mania appeared in a fright mask, like the terrifying Crone-face of Medusa or Destroying Kali.
Mania was not solely a spirit of death or madness, however, in classical times. Her "moon-madness" or "lunacy" was viewed as a revelation of the divine, to be received with gratitude. Socrates said, "The greatest of our blessings comes to us through mania...Madness coming from [the deity] is superior to sanity of human origin." In other words, Mana-Mania was the Muse. Gnostics said Mana is "the divine spirit in man"; and the Great Mana, or Mana of Glory, is "the highest godhead."