The three witches are the most prominent voices of unnaturalness in "Macbeth". The description of the "weird sisters" in the first scene of the play gives an indication of the mischief which will eventuate throughout the course of the play. The image that we are given of the witches is an odd one; Banquo portrays them as "withered" and "wild in their attire" and also comments on their "beards". Shakespeare has them speak in short rhyming verse, which differentiates from the other main characters in the play who mostly speak in blank verse. The witches' language imitates the casting of a spell, which conveys an impression of the supernatural in their speech. They may be viewed as instruments of malicious forces which seek to lead Macbeth away from goodness, tempting him to choose to fulfill his ambitions by malevolent methods. The interpretations of the witches' prophecies are made by Macbeth himself, he is responsible for his own damnation. Fate may be fixed, but how it eventuates is a matter of chance of Macbeth's own choice.
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