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What is Spiritism? > Chapter II—Elementary notions of Spiritism > Communications with the Invisible World > 37
37. The quality of spirits may be determined by their language. The language of truly good, high order spirits is always dignified, noble, logical and lacking in contradictions; it displays wisdom, benevolence, modesty and the purest morality; it is concise and does not employ needless words. Regarding ignorant or proud low order spirits, the emptiness of their thoughts is almost always made up for by a superabundance of words. Every obviously erroneous thought, every maxim contrary to sound morality, every piece of foolish advice, every gross, trivial or just plain silly expression, and lastly, every trace of malevolence, presumptuousness or arrogance are incontestable signs of the spirit's unevolved character.