There are some natures purely contemplative and antipathetic to action, who nevertheless, under a mysterious and inexplicable impulse, sometimes act with a rapidity of which they would have believed themselves incapable. Such a one is he who, fearing to find some new vexation awaiting him at his lodgings, prowls about in a cowardly fashion before the door without daring to enter; such a one is he who keeps a letter fifteen days without opening it, or only makes up his mind at the end of six months to undertake a journey that has been a necessity for a year past. Such beings sometimes feel themselves precipitately thrust towards action, like an arrow from a bow.