The volitive mechanism which prepares for decision is one of the most important mechanisms of the will; it is valuable in itself, and should be established and strengthened in itself. Pathology illustrates it for us apart from the other factor of the will, and thus places it before our eyes as a pillar of the great vault which supports the human personality. The so-called "mania of doubt" is one of the most frequent phases in the degenerative forms of psychopathy, and sometimes precedes certain obsessions, which urge the sufferer on irresistibly to the commission of immoral or harmful acts. But there may also be a mania of doubt simple and genuine, which is confined to the impossibility of taking a decision, and which produces a serious state of distress, though it induces no moral lapses, and may even arise from a moral scruple. In a hospital for nervous disorders I once encountered a characteristic case of the "mania of doubt" which had a moral basis. The patient was a man whose business it was to go round to houses collecting refuse; he was seized with misgivings lest some useful object should have accidentally fallen into the rubbish-baskets, and that he would be suspected of appropriating it. Hereupon the unhappy man, just when he was about to go off with his load, climbed all the stairs again, and knocked again at all the doors, asking whether something valuable might not perhaps have chanced to be in the baskets. Going away after assurances to the contrary, he would return and knock again, and so on. In vain he applied to the doctor for some means of strengthening his will. We told him repeatedly that there was nothing of any value in the baskets, that he might be quite easy on this point, and carry on his business without any preoccupations. Then a gleam of hope shone in his eyes. "I may be quite easy!" he repeated, going away. In a minute he was back again. "Then I may really be easy?" In vain we reassured him. "Yes, indeed, quite easy." His wife led him away, but from the window we saw the man stop at a certain point in the street, struggle with her, and come back in great agitation. Once more he appeared at the door to ask: "I may be quite easy then?"