This presentation discusses Lady Macbeth's influence on Macbeth's psychology in Shakespeare's play. Lady Macbeth learns of a prophecy that Macbeth will become king of Scotland and manipulates his weak will to convince him to murder King Duncan. She scolds Macbeth when he hesitates and argues that killing Duncan is the only way for Macbeth to prove he is a man. Through her influence, Macbeth carries out the murder and becomes king, but Lady Macbeth later shows signs of guilt and mental illness from their crimes before dying.