The supernatural element also taking place in Lady Macbeth's soliloquy of calling upon evil spirits to give her power to plot the murder of Duncan without any remorse or conscience. "Come, you spirits that tend on mortal thoughts, unsex me here. Come to my woman's breasts for gall" (Act 1 Scene 5), her soliloquy shows that she relied on the supernatural by asking for the spirit to get rid of her natural feelings of concern by making her cruel. The interference with the supernatural might cause her to be possessed by ghost when she goes mad and sees blood on her hands.
As Macbeth awaits for the signal to make his way up to the stairs, he sees floating dagger and said "Thou marshal'st me the way that I was going; and such an instrument I was to use. There’s no such thing. It is the bloody business which informs" (Act 2 Scene 1). Here Macbeth begins to question whether his mind playing tricks on him or there is presence of evil that put the dagger which being covered with blood. This shows that there is interference of supernatural that leads Macbeth towards the Duncan's chamber to do the murder. The dagger symbolizes the point of no return for Macbeth. If he chooses the path in which the dagger leads, there will be no turning back.
After Macbeth did the murder, he becomes a king. Although he has already achieve his goal to be a king, he begins to be greedier to not let the Banquo's prophecy of being father of kings come true because he thinks he has put a great effort to reach the throne. Therefore, because of his fears due to Banquo's prophecy, Macbeth proceeds to plot the murder of his friend, which caused him to fall into a deeper hole. Once the murderer notified Macbeth that the deed was done, he observed Banquo's ghost in the place reserved for him. "What man dare, I dare. Approach thou like rugged Russian bear. take any shape but that, and my firm nerves shall never tremble” (Act 3 Scene 4). Macbeth feels frightened at the sight of the bloody ghost haunting him and proclaims that he could take any wild animals, but not Banquo's ghost. This shows the interference of spirit in Macbeth's mind and this caused Macbeth to act in a wild manner, making people suspicious of his actions. Macbeth’s says later on "I will, to the weird sisters: more shall they speak, for now I am bent to know by the worst means the worst" (Act 3 Scene 4). This shows that the existence of the ghost also tempts Macbeth to return to the three witches, desiring more information regarding his fortune.
As the witches are preparing a soup in a cauldron, Macbeth enters and roughly demands them to answer his questions. Therefore, the witches show him three apparitions.
The first apparition is a head wearing a helmet. It says "Macbeth! Macbeth! Macbeth! Beware Macduff! Beware Thane of Fife." This apparition warns Macbeth to beware of Macduff before disappearing. This drives Macbeth to hate Macduff more and on learning that Macduff has escaped before he can have him murdered, Macbeth immediately decides to murder his whole family. This shows Macbeth as an evil king, he decides the murder because he can do it.
The second apparition is a child covered with blood who tells him that "for none of woman born shall harm Macbeth." This apparition assures Macbeth to will not be harmed by man who born by woman. This convinced Macbeth of the power he has by thinking how could Macduff, a man of woman born, hurt him. "Then live, Macduff: What need I fear of thee? But yet I'll make assurance double sure, and take a bond of fate." It says that although Macbeth has learned that Macduff will not hurt him, as Macbeth thinks that Macduff is a woman born, he still not completely feel assured that he will not be harm by anyone.
The third apparition is a child crowned with a tree in his hand tells Macbeth "Macbeth shall never vanquished be until Great Birnam Wood to high Dunsinane Hill shall come against him." It says that Macbeth will never be defeated until 'Great Birnam Wood' moves against the castle at Dunsinane. "That will never be, who can impress the forest. sweet bodements, good!" It shows that Macbeth feels completely certain that no man can kill him and he will not be defeated until a forest uproots itself and moves.
All of these apparitions show the interference of the spirit who tells Macbeth about his fortune. These apparitions are good news for Macbeth. The witches encouraged him to believe he is invulnerable and indestructible. He has found protection in the strength of spirit's words. Having possession of all the confidence in the world, he fears no one. The prophecies at the beginning of the play led him to his success, and those apparitions at the end just led to his tragic death. It is a tragic death because without known that Macbeth will become a king, he would still be a brave soldier, honest and humble man.
From all above, the use of the supernatural provides a suspenseful Macbeth play. The first prophecies have led Macbeth to murder Duncan and Banquo in order to gain the power of the throne. Lady Macbeth also relied on supernatural by her soliloquy to change her into a creature without human compassion, which at the end shows that spirits might possess her. The vision of the dagger also shows the interference of spirit that leads Macbeth's way to Duncan's chamber. After his encounter with the ghost of Banquo, Macbeth proceeds to visit the witches one last time to insure his security. After this last visit, Macbeth becomes over confident which cause his tragic death. Without the witches, Lady Macbeth, strange nature, vision of dagger, ghost, and the apparitions, the play "Macbeth" would have been a dull and tiresome play.
