For, to encompass them by a definition, dæmones are living beings in kind, rational creatures in mind, susceptible to emotion in spirit, in body composed of the ær, everlasting in time. Of these five points I have listed, the first three are shared with us, the fourth is their own, the last they have in common with the immortal gods; but they differ from them in their capacity to suffer.

Apuleius, On The God of Socrates