A metaphor used in Mecbeth’s Act 2 Scene 1 is “a dagger of the mind is a false creation from his mind. This gives us an idea of what Macbeth is thinking and of what he is going to be doing. He know himself that he will be killing Duncan but he doesn’t know how,when or where. We can see that Meecbeth even being a noble person doesn’t want want to kill Duncan and he feels disgusted by that idea.Shakespeare compares the actual dagger to the pain of the dagger to the mind meaning the thought of a dagger of worse than actually weilding the dagger.