I need to write a comparative essay about Macbeth and Lady Macbeth being killers with a conscience, which makes their story a tragedy.
Is my thesis good, or does it need a bit more work? Macbeth, Lady Macbeth and Macbeth's guilty conscience is resposible for their downfall, due to the fact that it leads to them to think suicidal thoughts, they have hallucinations and they live in fear.
Lady Macbeth fits this thesis perfectly. She is completely without any sense of morality early in the play, when she pushes her husband to carry out the murder of Duncan, and then encourages him not to feel remorse after the deed is done. By the end of the play, however, she is clearly torn apart by guilt for what they have done, as Shakespeare shows us with her famous "out, damn'd spot" soliloquy. Her suicide comes shortly thereafter.
Macbeth, on the other hand, seems to travel the opposite trajectory. He is reluctant to kill Duncan and feels guilty after the fact. The ghost of Banquo at the banquet table suggests that he feels guilty for that murder, too. Yet by the end of the play, particularly after having Macduff's family murdered, (the first murder, perhaps significantly, that Lady Macbeth was not involved in planning) he seems to feel little remorse, if any, for what he has done. He has become a murderous villain. I do, however, agree that he is fearful. That is why, in my view, he visited the witches again, when they conjured the visions for him.