Demon, or Daimon, a name which Socrates gave to an inner divine instinct which corresponds to one's destiny, and guides him in the way he should go to fulfil it, and is more or less potent in a man according to his purity of soul.
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Demoivre, Abraham * De Morgan, Augustus