According to Tanzi[3] the theme underlying the delusional system of litigious paranoiacs is avarice, and the whole may be looked upon as the slow and permanent triumph of a preconception. "The paranoiacal preconception gradually conquers all evidence to the contrary, and in spite of reality, public opinion and common sense, it becomes organized into a coördinated system of errors which become the tyrants of the intellectual personality and remove it by degrees outside the bounds of normality." The litigant constantly busies himself with his grievances, loses all interest in everything else, and begins to fight for his rights. He stops at no means and is the bane of judges and court officials. Naturally, he has to be refused all aid, either because he is unjust or because the courts find no remedy for his troubles. He refuses to settle actual grievances, carries the case from one court to another and finally develops an insatiable desire to fight to the bitter end. The statutes appear to him inadequate and even the fundamental principles of law fail him. He cannot abide by the ultimate decision after all the usual means of justice have been exhausted. In his attempts to gain justice he writes to magistrates, legislators and various other people in prominence. It is only after years of persistent misfortune both to himself and the objects of his delusions, which only serve to harden him against his fortunate opponents, his incapable lawyers, the corrupt judges and his ignorant and craven-hearted relatives, that this master of procedure is betrayed into the expression of threats or the commitment of some other offense which conveys him summarily from the civil to the criminal courts, and the unrepentant pursuer becomes the defendant, unless, indeed, the insane asylum has become his refuge. (Tanzi.)
This is precisely what happened with the patients whose histories are here recorded. With all this the paranoiac remains plausible, converses rationally and coherently, shows himself to be exceedingly well-informed on current events, amazes his listeners with his really wonderful memory and his ability to quote _ad infinitum_ from law books and statutes. Absence of hallucinations is the rule. Memory and the capacity to acquire new knowledge remain intact, and reasoning and judgment on matters of everyday life which do not touch his more or less circumscribed delusional field may remain quite normal. In short, he shows none of those tangible signs and symptoms upon which we must so frequently rely in our efforts to convince a jury of laymen of the existence of mental disorder. It is only when we take into consideration the entire life history of a paranoiac, which unfortunately is frequently ruled out as hearsay evidence, that the real state of affairs becomes manifest. We then see that where it concerns his delusional field the paranoiac's judgment is formed, not as a result of observation, or logic and reasoning, but as a result of an emotion, a mere feeling that this or that proposition is true. In every adverse decision of the court he sees a deep-laid conspiracy to deprive him of his rights. His lawyers are incompetent and in collusion with his persecutors; the judge is corrupt or ignorant of the law, and the legislators negligent in their duties in not writing into the statutes laws which would take care of his grievance. He constantly harps upon what he calls "the principle of the thing", losing, gradually, all concern in the real issues involved.