There is an urgent need for a radical revision of our current concepts of the nature of consciousness and its relationship to matter and the brain.
Stanislav GrofI have taken part in ceremonies with North American and Mexican shamans, as well as Brazilian ceremonies.
Stanislav GrofWhen you read the psychedelic literature, there is a distinction between the so-called natural psychedelics and synthetic psychedelics that are artificially produced.
Stanislav Grof