I would be careful equating the oracles of Delphi with psychosis, since religious practices can bring about visions and out of body experiences without drugs or

I would be careful equating the oracles of Delphi with psychosis, since religious practices can bring about visions and out of body experiences without drugs or underlying pathologies. For example, some Eurasian shamans practice "ecstatic dance" where oxygen deprivation and exhaustion result in shamanistic experiences (visions, auditory hallucinations, etc) without the use of drugs.