求：The Cask of Amontillado的主题是什么，作者如何成功表现主题？

白葡萄酒的主题是：人性的黑暗面。
作者通过对话塑造人物角色。对话表明了主角的黑暗/邪恶的一面。作者同样通过对话和细节描写表现了主角内心的变化，如：主角一再问福吐纳是否需要出去，而这一系列问题反而更引起他的好奇心与虚荣心，要一探究竟。文章最后的对话中，主角再一次提到，福吐纳是否要出去。前后呼应，表现文章的逻辑性。尤其是最后一句的希腊语，更是突出了文章主旨。虽然主角是受过教育的人，但是当他复仇成功时，任然难以平息他的仇恨。足见他内心的阴暗与邪恶。
文章整体十分具有艺术性。引人入胜。行文十分顺畅，前后衔接的天衣无缝。
In the short story the cask of Amontillado, Edgar Allen Poe creates the main characters by the dialogue between them. The dialogue shows how dark and evil the protagonist is. The writer also mirrors the inner change of the main characters by using the conversation between them and some detailed depiction. Finally, the background of the writer is also very important for you to understand the theme of the story. The more you know about the writer, the deeper you will understand the story.
The suspense in the story is very artful and attractive. The suspense also makes the beginning of the story more clearly. The whole story goes on very smoothly. You can see the suspense almost everywhere in the story. But the