The Penguin Handbook of Ancient Religions Quotes

“The widespread shamanistic notion of a tiered cosmology – the level on which people live and spirit realms below and above – probably derives from certain universal experiences of altered states. These include sensations, on the one hand, of rising up and flying, and, on the other, of entering a vortex and passing underground and through water.”
― John R. Hinnells, The Penguin Handbook of Ancient Religions