the psyche, however, returns to the aither… 'The aither has received the souls, earth the bodies'… 'The nous of the dead is not living, but immortal, and can perceive once it has gone into the immortal aither.'
Burkert demonstrates that aither becomes the eschatological destination of the immortal psyche-nous in fifth-century Greek thought, marking a decisive theological break from Homeric religion.
, Greek Religion: Archaic and Classical, 1977thesis