Complex sentence: The oracles of ancient Greece were known to experience auditory hallucinations while breathing in certain neurologically active vapors, while the more pervasive delusions and symptomology were often viewed as possession by demonic forces as punishment for misdeeds.
Split into simpler sentences: The oracles of ancient Greece were known to experience auditory hallucinations while breathing in certain neurologically active vapors. While the more pervasive delusions and symptomology were often viewed as possession by demonic forces as punishment for misdeeds.