Michael Psellus (1018 - 1178 C.E) forms the bridge between the ancient classical view of the daemon as a beneficial guiding spiritual presence (a link between man and the gods) and the later Christian view of demons as intrinsically evil. His writing helps to explain both of these aspects, and the evolution from one to the other. Psellus was a noted author and philosopher of the Byzantine era in the Greek speaking part of the Roman Empire centred...