In the Shakespeare play "Macbeth," one of the themes is very evident. That Theme being that the supernatural has an effect on human nature. Some of the supernatural in Macbeth includes witches, apparitions, and ghosts. The supernatural had an affect on Macbeth making him a greedy, evil tyrant.
             Macbeth's first encounter with the supernatural is when he meets the three witches in act one, scene three. The three witches give Macbeth prophecies: "All hail, Macbeth, hail to thee, Thane of Cawdor! All hail, Macbeth, that shelt be king hereafter!" (A1 S3 L51-53). After which the witches vanish. Shortly afterwards Ross and Angus appear to inform Macbeth that he is the new Thane of Cawdor, fulfilling the first of the prophecies. Macbeth then writes Lady Macbeth telling her about the witches and prophecies. Also Duncan (the king) plans to come for a dinner at Inverness (Macbeth's Castle). Lady Macbeth then begins to plan Duncan's murder, leading to Macbeth's second supernatural encounter.
             Lady Macbeth planned the murder of Duncan, but Macbeth must carry out the deed to lead to his second encounter. But before Macbeth can commit murder Banqou comes across him in the dark : "Give me my sword. Who's there?" (A2 S1 L12). This is significant because Banqou fails to recognize his friend. This showing a change in Macbeth's character. As Macbeth awaits the signal from Lady Macbeth, an apparition of a bloody floating dagger. Macbeth proclaims at the site of it : "Is this a dagger, which I see before me, the handle toward my hand?" (A2 S1 L41-42) The dagger symbolizes the point of no return for Macbeth. If he chooses the path on which the bloody dagger points there is no going back. Banqou's failure to recognize Macbeth at night proves Macbeth has begun to change. This second encounter has changed him even more, because he took the path of the dagger and killed Duncan.
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