Macbeth: Lady Macbeth and Evil In a play that is abundant in evil occurrences, Lady Macbeth is the overriding source of evil in the first act. Lady Macbeth persuades Macbeth to kill Duncan, despite Macbeth listing eight reasons against the murder. When Macbeth is alone, we discover that he is a loyal thane to Duncan, not a murdering savage. When Duncan is in his house at Inverness, Macbeth comes to a decision not to kill Duncan. Lady Macbeth convinces Macbeth, who decided strongly against murdering Duncan, to go ahead with their plan to murder Duncan. Lady Macbeth is very successful at persuad