First, before seeing the patient it is well to get from his family, friends, and physician a full knowledge of his natural state, all the facts known to them relating to strange behavior, delusions, etc., as they give most useful hints with regard to the method of examination. Apparent familiarity with an insane person's delusions will often secure their immediate acknowledgment. In a case of any obscurity or where there is doubt that other causes than insanity may have produced the unusual behavior, and particularly if any legal steps are to be taken regarding guardianship, restriction of liberty, commitment to an asylum, validity of wills and contracts, capacity to manage property, marriage, etc., it is imperative that both sides of the question be fully heard before any positive opinion is given. After the patient's confidence has been gained in general conversation, during which his appearance, manner, and mental condition as to intelligence, coherence, memory, judgment, perception, and capacity may be noted and compared with his normal standard, he should be examined carefully for any external evidence of lack of development or of injuries to the head. As in all other diseases, the condition of every organ of the body should be noted; a complete diagnosis should be made. The expression of the face often indicates such excessive excitement, gloom, stupor, suspicion, or fear as must be due to insanity alone. {124} Throughout the examination the questions and manner of the physician should be such as to avoid suggesting unpleasant ideas or associations to the patient. The matter of suicide should never be first mentioned by the questioner, and not seldom he does best who listens most and lets his patient disclose his morbid ideas and impulses, as he will frequently be led to do, if at all, by the manifestation of interest and sympathy, and of knowledge of the symptoms of the disease in hand, on the part of the physician. He often gets enough for his purpose without getting the whole story, upon which it sometimes does harm, or at least is not best, that the patient should dwell. In the diagnosis of mental disease, however, as well as in estimating responsibility, the fact must be borne in mind that a controlling delusion may be concealed for months or even years, and that the symptoms and mental condition of insane people vary so much at different times that it may be quite possible to get distinct evidence of unsoundness of mind at one time and not at another. The power of self-control is also liable to the same variation or alternation.