The incidence and prevalence of mental diseases are growing throughout the world and their causes are not yet clearly established in spite of the recent advances in modern psychiatry. Spiritism is the collection of principles and laws, as revealed by the superior spirits, through a natural human condition named mediunship and published in 1857 in Paris. Spiritist Centers are the place of the mediunship meetings with interchange and intellectual relationship with spirits. They are very common in many countries all over the world. Utilizing doctors and mediuns with the sensibility to crearly see the spiritis and spiritual realm related to each case of mental disease, we can talk to them and, through dialogue, prayer and energy transfer benefiting them, obtain the dissolution of the ties between them and the patients. That spiritis with revenge, hate, jealousy, rivalry and many other feelings projected to the patients are rescued and guided to a different and better spiritual reality. That ties and disharmony were caused in past lives of that patients in common human experiences and relationships. All that steps of this aproach are monitored by the mediuns. After that we study the follow-up of each patient and comparing the results we can see a clear benefit and recovery of the majority of cases. Patients with schizofrenia, bipolar disorder, autism, depression and other diagnosis were treated by this aproach.