"Fair is foul, and foul is fair" (I.i.10). This becomes
the key phrase in describing Macbeth's downfall. It
defines the night vs. day motif, foreshadowing the evil
that will soon come. The night vs. day motif is so
important in bringing out the theme of evil in this play
because almost all of the elements of Macbeth's downfall
are revealed at night. Sleeplessness, murder, and the
witches' prophecies all become relevant as the drama
unfolds.
When the witches tell Macbeth that he will soon be
the Thane of Cawdor, his ambition blossoms. Before long
he realizes that he has to get Duncan o…
