【正文】 the best of them is, that is never lasts.”[4](p125) From here, we can see Fagin begins to trust Nancy again .He believes Nancy saving Oliver last time just was outburst .It does not last for a long time. Bill Sikes is ill with a fever and very poor now. Fagin and his friends pretends to drop in .In fact, he just has new task .Because he know Sikes is willing to do thing for living at a greater risk, in such a hard time, “I have never fot you, Bill, never once!”Fagin said. “No, I’ll pound it that you han’t,” replied Sikes, “ You are scheming and plotting away ,every hour that I’ve laid shivering and burning here。 and Bill was to do that ,and Bill was to do it all, dirt cheap ,as soon as he got well ?！痵uch a number of nights as I’ve been patient with you, nursing and caring for you, as if you had been a child……” [7](P245) It is a woman‘s love expression to a man, although the man is such a vicious person. In her pitiful life, she cannot find any other fort besides giving her broken heart to a man and being loyal to him. As a woman, love is highest spiritual support. Where Nancy lives determines who loves .In her world she has not choice besides being loyal to a man in her way. In other‘s eyes, it is unreasonable. In the meeting with Rose, Nancy refuses Rose‘s help her escape her from her criminal life. Rose can not understand and asks Nancy,. “…. What fascination is that can take you back, and make you cling to wickedness and misery?” The girl replied, “… set our rotten hearts on any man, and let him fill the place that has been a blank through all our wretched lives, who can hope to cure us? Pity us, lady pity us for having only one feeling of the woman left and having that turned, by a heavy judgment, from a fort and a pride into a new means of violence and suffering. ” [8](P259) Sikes and Nancy, the first letter of their name are ?S‘ and ?N‘, they stand for the two poles of the earth, implying two different characters, but they cannot live without each other. Nancy refuses Mr. Brownlow and Rose‘s help, but she says that she is chained to her criminal life. Nancy is passionate and intelligent, While Sikes is a brutal professional burglar brought up in Fagin‘s gang .He treats Nancy with an odd bination of cruelty and grudging familiarity .His murder of Nancy is the most heinous of many crime that occur in the novel. After murdering Nancy, Sikes flees London, only to find that his conscience will not let him escape. The entire account of Sikes‘s flight is also among the most psychologically sophisticated passages in the novel. Up until this point, Sikes has been a pure villain .In his guilt, however, he bees realistically human. Pursued by his guilty conscience and an angry mob, he inadvertently hangs himself while trying to escape. Nancy‘s love for Sikes exemplifies the moral ambiguity of her character. As she herself points out to Rose, devotion to a man can be ―a fort and a pride ―under the right circumstances But for Nancy, such devotion is ―a new means of violence and suffering‖indeed, her relationship with Sikes leads her to criminal acts for his sake and eventually to her own demise .The same behavior, in different circumstances, can have very different consequences and moral significance. In much of Oliver Twist, morality and nobility are blackandwhite issues, but Nancy‘s character suggests that the boundary between virtue and vice is not always clearly drawn. 2 The Reason of Nancy’s Double Character England in the 1830s was rapidly undergoing a transformation from an agricultural, rural economy to an urban, industrial nation. In the extremely stratified English class structure, the highest social class belonged to the ―gentleman,‖ an aristocrat who did not have to work for his living. The growing middle class had achieved an economic influence equal to, if not greater than, that of the British aristocracy. Many members of the middle class were anxious to be differentiated from the lower classes, and one way to do so was to stigmatize the lower class as lazy goodfor –nothings. Victorian society interpreted economic success as a sign that God favored the honest, moral virtue of successful individual‘s efforts and, thus, interpreted the condition of poverty as a sign of the weakness of the poor individual. The poor were naturally destined for lives of degradation and desperation. Living in such a society, although Nancy hopes some difference will happen on her, the society is hard to make her dream e true. Social Environment’s Influence to Nancy’s Double Character Nancy has bee a child pickpocket from a very young age. It is hard to know her birth background from the novel. She may be a love child as Oliver. What makes her to seek ―help‖ from Fagin? When Oliver sees Fagin‘s act, he feels it is very interesting. In a younger age than Oliver, Nancy can‘t recognize what is virtue or evil. Both of them are subjected to the paternal authority of Fagin and are dependent upon him for their food and shelter. While such a family provides panionship and a means for survival, it is not ultimately nurturing or morally healthy. Although after writing Oliver Twist, Dickens denied that antisemitism had influenced his portrait of Fagin, the Jewish thief‘s characterization does seem to owe much to ethnic stereotypes .He is ugly, simpering, miserly and avaricious. Constant references to him as ―the Jew‖ seem to indicate that his negative traits are intimately connected to his ethnic identity. However, Fagin is more than a statement of ethnic prejudice. He is a richly drawn, resonant embodiment of terrifying villainy. At times, he seems like a child‘s distorted vision of pure evil .He is such a conniving career criminal, who takes in homeless childre