Before she can become Rochester's wife, Jane must prove her acceptability based on class. Does she have an upper-class sensibility, despite her inferior position at Thornfield? For example, when Bessie sees Jane at Lowood, she is impressed because Jane has become "quite a lady"; in fact, her accomplishments surpass that of her cousins, yet they are still considered her social superiors based solely on wealth. The conversation emphasizes the ambiguities of Jane's family's class status and of the class system in general: Should a lady be judged based on academic accomplishments, money, or family name? The novel critiques the behavior of most of the upper-class characters Jane meets: Blanche Ingram is haughty and superficial, John Reed is debauched, and Eliza Reed is inhumanely cold. Rochester is a primary example of upper-class debauchery, with his series of mistresses and his attempt to make Jane a member of the harem. In her final view of Thornfield, after Bertha has burned it down, Jane emphasizes the stark contrast between her comforting, flowering, breathtaking dream of Thornfield, and the reality of its trodden and wasted grounds. The discrepancy emphasizes that the world's vision of the upper classes doesn't always capture the hidden passions that boil under the veneer of genteel tranquility.
One of Jane's tasks in the novel is to revitalize the upper classes, which have become mired in debauchery and haughtiness. Just as Rochester sought Jane for her freshness and purity, the novel suggests that the upper classes in general need the pure moral values and stringent work ethic of the middle classes. At novel's end, Rochester recognizes the error in his lifestyle, and his excessive passions have been quenched; he is reborn as a proper, mild-mannered husband, happily dependent on his wife's moral and intellectual guidance.
