Praeparatio Evangelica (The Preparation of the Gospel)

'IN connexion with the discourse concerning gods we must inquire into that which concerns daemons and heroes.

'Thales, Pythagoras, Plato, the Stoics: daemons are beings of the nature of souls: heroes also are souls which have been separated from their bodies; and the good souls are good daemons, and the bad souls evil daemons.

'But Epicurus admits none of these opinions.'