Example:

"Anon.
Fair is foul, and foul is fair:
Hover through the fog and filthy air."
(Act 1, Scene 1, Lines 10-11).


Explanation:

The witches say that, "fair is foul and foul is fair." This is obviously a paradox but proves to be true by the end of the play as many of the fair predictions of the witches turn foul for Macbeth.