How Is Lady Macbeth Insane

The story opens with the titular war hero, Macbeth, meeting three witches during his travels. The witches prophesize that Macbeth would become king. Upon receiving this news he writes a letter to his wife, Lady Macbeth regarding what has happened, this is the event which will trigger much of the tragedy in the play. Lady Macbeth, lusting after the power that becoming a queen would bring, convinces her husband to kill the current king, Duncan. This is her first instance of initiating violence, but the character of Lady Macbeth is in fact the main source of tragedy throughout most of the play. Macbeth succeeds in his assassination, but is not happy about becoming king, the guilt begins to drive him mad and he launches into a string of other killings or various characters. Lady Macbeth too is driven insane by the weight of their deeds, and the violence spread by the two of them eventually results in both of their deaths.
She immediately reveals her ambition and desire for power; she is concerned that on his own, Macbeth will not have the courage to kill Duncan and become king. Lady Macbeth is unstable, controlling, and cruel. She manipulates her husband into committing several murders by playing on his sense of masculinity, she mocks him, saying that he is "too full o' the' milk of human kindness" to kill anyone. Lady Macbeth shows a chilling lack of remorse regarding her involvement in the deaths, going so far as to claim that given the chance, she would emotionlessly dash out the brains of a nursing