There was a strong role of a supernatural force in Macbeth. The witches supposedly had a power to see the future. Or perhaps they had the power to change the future. Then there was the three ghosts that predicted the future. And of course the bloody dagger that appears to Macbeth before is going to commit his first murder seems a little too coincidental to not be supernatural. The Three Witches are the strongest of the supernatural powers in the play. Although they speak of the future, they do not seem to affect the course of it.
They are the agents of fate because they only speak of the truth of what will happen. There is one line in the play that has the most supernatural effect. Fair is foul and foul is fair. The theme that foul is fair and fair is fowl has the biggest supernatural pull The Witches do not predict that he will commit murder to become king but only that he will become king. For example, they all hail Macbeth as king by saying, All hail, Macbeth, that shalt be king hereafter! Even if the witches werent there, Macbeth would have somehow become king because of fate.
The Witches know how he will get to be king and it would be fair to tell Macbeth, but they follow the fair is foul policy. The Witches have the biggest affect on Macbeth because they are the ones who are delivering these fair prophesies. When the Witches prophesize that no man born from a womans womb can defeat him, he feels invincible. However, Macbeth does not realize that Macduff was born unnaturally. Lady Macbeth is affected from the theme as well as Macbeth is. She thought that becoming Queen would make her happier but she later feels that life is not worth living.
She says, Naughts had, alls spent, Where our desire is got without content. Tis safer to be that which we destroy Than by destruction dwell in doubtful joy. After murdering Duncan and becoming Queen, she wants to have her old life back or die than to be where she is. Because of her burning ambition to be Queen, her life is ruined. Lady Macbeth constantly taunts her husband for his lack of courage and that he is too full o th milk. But in public, she is able to act nicely as a skilled and superior person.
She later is unable to bear the events and has become a victim of nightmares and hallucinations. When Lady Macbeth expected to have a fair life after killing Duncan, her life turned very foul. Macbeth and Lady Macbeth have both been affected by the paradoxical theme of fairness and foulness. brought by the Witches. The theme of things not being as they seem to be has applied to both of these characters. The Witches are only able to tell the future and not change it, Macbeth acted upon it, and Lady Macbeth became insane from her ambitions of being fair.