The soliloquy in Act 1, Scene 7 - Macbeth struggles with whether he should murder Duncan. Macbeth also acknowledges that his role as Duncan’s host and subject is to protect his king, not murder him in his sleep. Macbeth senses that the murder will change his life, by making him king, but also by unleashing his dark ambition on the world. By the end of the speech, he seems to have decided against the murder, but his wife will soon talk him back into it.