The neurotic symptoms then have their meaning just like errors and the dream, and like these they are related to the lives of the persons in whom they appear. The importance of this insight into the nature of the symptom can best be brought home to you by way of examples. That it is borne out always and in all cases, I can only assert, not prove. He who gathers his own experience will be convinced of it. For certain reasons, however, I shall draw my instances not from hysteria, but from another fundamentally related and very curious neurosis concerning which I wish to say a few introductory words to you. This so-called compulsion neurosis is not so popular as the widely known hysteria; it is, if I may use the expression, not so noisily ostentatious, behaves more as a private concern of the patient, renounces bodily manifestations almost entirely and creates all its symptoms psychologically. Compulsion neurosis and hysteria are those forms of neurotic disease by the study of which psychoanalysis has been built up, and in whose treatment as well the therapy celebrates its triumphs. Of these the compulsion neurosis, which does not take that mysterious leap from the psychic to the physical, has through psychoanalytic research become more intimately comprehensible and transparent to us than hysteria, and we have come to understand that it reveals far more vividly certain extreme characteristics of the neuroses. The chief manifestations of compulsion neurosis are these: the patient is occupied by thoughts that in reality do not interest him, is moved by impulses that appear alien to him, and is impelled to actions which, to be sure, afford him no pleasure, but the performance of which he cannot possibly resist. The thoughts may be absurd in themselves or thoroughly indifferent to the individual, often they are absolutely childish and in all cases they are the result of strained thinking, which exhausts the patient, who surrenders himself to them most unwillingly. Against his will he is forced to brood and speculate as though it were a matter of life or death to him. The impulses, which the patient feels within himself, may also give a childish or ridiculous impression, but for the most part they bear the terrifying aspect of temptations to fearful crimes, so that the patient not only denies them, but flees from them in horror and protects himself from actual execution of his desires through inhibitory renunciations and restrictions upon his personal liberty. As a matter of fact he never, not a single time, carries any of these impulses into effect; the result is always that his evasion and precaution triumph. The patient really carries out only very harmless trivial acts, so-called compulsive acts, for the most part repetitions and ceremonious additions to the occupations of every-day life, through which its necessary performances--going to bed, washing, dressing, walking--become long-winded problems of almost insuperable difficulty.