Classified Delusions of the Insane [excerpt]

     The most dangerous delusions are those of paranoia or delusional insanity. As this form is congenital, the delusions may begin early in life and become more pronounced as age advances. Those suffering from paranoia are always peculiar, and are classed as such by their friends while growing up. They are usually silent and unfriendly. Preferring to be alone, they shun the world. They feel slighted and believe that the world owes them a debt. These delusions also take the form of persecution until hatred for some one becomes so great that life may be taken, even that of the closest of friends. Before this crisis is reached, the patient will be very much depressed and uncommunicative. By virtue of contemplation their hatred and delusions become fixed and a natural part of life. Such persons are usually not recognized by the public at large until the explosion occurs and the crime is committed, as in the case of Guiteau and Czolgosz.