What effect does Edgar Allan Poe achieve in "Tel-Tale Heart"

Edgar Allan Poe achieves the destruction of a constant reminder of mortality. He use “eye” to symbolize “I”. Poe presents the dark side of people in the story. The narrator says he or she is not mad, and tries to convince people that fact by how carefully this brutal crime was planned and executed. However, I still think the narrator is insane. In the story, the eye of the old man makes the narrator feels fear. The narrator becomes a victim to the madness which he had hoped to elude. And this irrational fear leads to murder. The narrator really means he or she wants to destroy the evil “I” when he or she says he or she must destroy the evil “eye”. The narrator is insanity’s darkness. He or she is in a claustrophobic state. The narrator is a scheming murderer. He or she hides in the darkness, and does everything at night. He has observed couple nights before his murderous behavior. He exhibits a pride when he is closer and closer to his target, the old man’s eye, and feels happy after he killed the old man. When the police arrive, the narrator acts as nothing has happened. However, after a while, the narrator can’t hide any more. He feels the beating of the old man’s heart, and the beating forces him to confess to his murder. The beating the narrator feels might be the frantic beating of his or her own heart.

爱伦·坡在《泄密的心》中想营造怎样的效果？说述者精神不正常吗？他说一定要毁了那只“眼睛”时，实际上表示他想毁灭“自我”吗？

在《泄密的心》中埃德加·爱伦·坡达到了什么效果?讲述者精神失常吗?当讲述者说他必须毁掉"眼睛"(eye)时,他真的是想说他要毁掉"我"(I)吗？