The main theme of Macbeth's tragedy is that option c. a killer must live with his conscience in act two.
After killing the king, Macbeth appears, and the two give one other assurance. Macbeth claims that his conscience is haunting him and is preventing him from sleeping soundly any longer. He is accused of purpose weakness by Lady Macbeth. She requests that he wash his hands, which should help him rid himself of his guilt.
Shakespeare uses a sequence of rhetorical questions in Act 2 Scene 1 of Macbeth's soliloquy to show the titular character's internal struggle over whether to carry out the murder of King Duncan.
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