How does Shakespeare demonstrate the power of the mind in Macbeth?

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‘‘How does Shakespeare demonstrate the power of the mind in Macbeth?’

Macbeth is a play famous for murder and its references to blood. It is usually associated with bad luck and evil; however, there is one main issue that appears time and time again throughout the play – what is it that drives the characters to do the things that they do? Shakespeare explores and presents the power of the mind in many interesting ways. These include soliloquies and slight changes in characters such as the way they talk, act or present themselves.

The main character affected by the power of his mind is, of course, Macbeth. What happens in his mind basically provides the plot for the whole play. Once the witches have told Macbeth that he will be king he can either choose to ignore this piece of information or do something about it to make it come around faster. Macbeth chooses to do the latter and he kills the current king, Duncan. Lady Macbeth becomes so caught up in the series of events and excited at the prospect of being Queen that she urges Macbeth on, encouraging him to fulfil his apparent destiny and become King. In the end, the way that Macbeth presents himself and talks is completely different to the character we are introduced to at the beginning of the play. This is all due to the effect his mind power has over him. We also see changes in Lady Macbeth’s character such as paranoia and slight changes in the way she talks and thinks.

The first evidence we see of mind power is in Act 1, Scene 3 where Macbeth meets the witches. Why do the witches’ prophecies in this scene have such power over Macbeth? Although Macbeth and Banquo hear the same thing, Macbeth is much more moved by the words, and I think the main reason for this is that the witches’ are speaking Macbeth’s innermost, dangerous thoughts. Once the witches say ‘Hail to thee, Thane of Glamis!’ (Macbeth’s current title) it becomes apparent to Macbeth that the witches are knowledgeable and are capable of predicting the future.  Shakespeare constructs the plot cleverly here.  The dramatic irony of the audience knowing he has been crowned Thane of Cawdor ensures that the audience are already aware of what the witches can do before Macbeth realises. The tragedy is often blamed on the witches because they torment Macbeth by speaking his thoughts in riddles and they make Macbeth think that his greatest prize is near. However, the witches could only have so much power over Macbeth if he already had these thoughts in his head. Therefore, Macbeth himself could be blamed for the tragedy of the play. If he had already thought about killing Banquo, but thought nothing of it until the witches had confirmed the idea, you could blame him entirely for the murder. The witches know what to say and exactly how to say it, which implies that they know what Macbeth is thinking. Another line in this scene which suggests that Macbeth had already thought about becoming King or killing Duncan is when he pleads with the witches to

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The fact that he was willing to listen to more of what the witches had to say suggests that he had thought of becoming King before and was reassured by the idea that it could really happen.

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Once the witches have vanished, Macbeth and Banquo visit Duncan at a room in his palace. Here, Duncan appoints Macbeth Thane of Cawdor. It is here that Macbeth begins to fully realise the impact the witches’ words are having on him. He also sees that they knew what was going to happen to him because they had said, ‘All hail Macbeth! Hail to thee, Thane of Cawdor’ in the previous scene.  In a powerful soliloquy, Macbeth reveals his thoughts to the audience:

‘…Stars, hide your fires!

Let not light see my black and deep desires;’ 

With ‘let not light see ...

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