While demons have been reported to manifest themselves in that way, many individuals who hear voices or experience other inexplicable, disturbing sensations have learned upon investigation that they have a medical problem.
पहिल्या शतकातही, लोकांनी हे स्पष्टपणे ओळखले, की दुरात्म्यांकडून होणारा हल्ला आणि आरोग्यविषयक समस्या यांचे कधीकधी सारखेच परिणाम घडत होते.