Act three- Macbeth

The witches could have influenced Macbeth's thoughts. "Never shake thy gory locks at me!" - Macbeth sees the ghost, so it is something supernatural.Banquo's ghost serves to show the path that Macbeth could have chosen as well as serving as a reminder of Macbeth's deeds. It is in this way that Banquo haunts Macbeth in two ways. Banquo's ghost serves as a reminder of the horrors Macbeth committed to gain the crown and the innocent blood he spilled.