斯坦贝克小说《伊甸之东》中的卡西和莉莎代表的是两类具有相反个人意志与伦理道德选择的人物,她们相异的人生追求导致了各自家庭的不同命运。本文从人物的自由意志和道德责任构成的社会伦理的相反命题入手,分析卡西的自由与动机、自由与自主、自由与责任和莉莎的道德与准则、道德与自我控制、道德与适度等人物塑造中显示的伦理学问题。 Casey and Lisa in Steinbeck’s novel Eden’s East represent two types of people with opposite personal wills and ethical choices. Their different pursuit of life leads to the different fates of their families. This article starts from the opposite proposition of the social ethics composed of the free will and moral responsibility of the characters, and analyzes Kathy’s freedom and motivation, freedom and autonomy, freedom and responsibility, Lisa’s morality and norms, morality and self-control, morality and moderation Ethical Problems Revealed in Characterization.