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What is Spiritism? > Chapter II—Elementary notions of Spiritism > Concerning Mediums > 64
64. Without harmony - the only quality that can lead to fluidic assimilation - communications are impossible, incomplete or false. They may be false because, in the absence of the spirit desired, there is no lack of others who are ready and willing to take advantage of the occasion to manifest, and who care very little about telling the truth.