What Was the Symbolism of the Dagger in Macbeth?

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The symbolism of the dagger in "Macbeth" is that it represents Macbeth's bloody destiny, and Macbeth's vision of this dagger is one of the many hallucinations and visions that creates a motif of deception throughout the play. As he is about to murder Duncan, Macbeth notices a floating dagger, all bloodied and pointed in the direction of the chamber of the king.