In its more extreme forms persecution mania is a recognized form of insanity. Some people imagine that others wish to kill them, or imprison them, or to do them some other grave injury. Often the wish to protect themselves from imaginary persecutors 1 ______ leads them into acts of violence which make it necessary to restrain their liberty. This, like many other forms of insanity, is only an exaggeration of tendency not at all uncommon among 2 ______ people who count as normal. I do not propose to discuss the extreme forms, that are a matter for a psychiatrist. 3 ______ It is the milder forms that I wish to consider, since they 4 ______ are a very frequent cause of unhappiness, and because, not having gone much far as to produce definite insanity, they 5 ______ are still capable of being dealt by the patient himself, 6 ______ provided he can be induced to diagnose his trouble right and to see that its origin lies within himself and 7 ______ not in the supposed hostility and unkindness of others. 8 ______ We are all familiar with the type of person, man or woman, who, according to his own account, is perpetually the victim of ingratitude, unkindness, and treachery. People of such kind 9 ______ are often extraordinarily plausible, and secure warm sympathy from those who have not known them long. There is, as a rule, nothing inherently improbable about every separate 10 ______ story that they relate.