The Weird Sisters and Lady Macbeth influenced Macbeth’s downfall, however it is Macbeth that is primarily at fault for allowing himself to be overcome by his greedy ambitions. The witches manipulated Macbeth by feeding his ambitions and Lady Macbeth helps Macbeth learn to answer to nothing but his own greed for power. It is however, Macbeth that caves to his curiosity and hamartia and demands the witches to tell him more about his future, even after they warned him. It was Macbeth not Lady Macbeth who organized the murder of Banquo and his son in order to secure himself and his power. The witches and his wife only spoke the thoughts that Macbeth already had in his mind, it was Macbeth who doomed himself when he decided that, “For mine own good / All causes shall give way” (line 166-167, Act3, Scene 4).