Shakespeare - Witches establish Macbeth’s future as Thane of Cawdor and king. Before the witches arrive and talk about things being foul and fair, Macbeth is a hero. Then the witches arrive. They are about to turn Macbeth from fair to foul.
Life’s but a walking shadow, a poor player That struts and frets his hour upon the stage And then is heard no more. It’s a tale Told by an idiot, full of sound and fury, Signifying nothing. [William Shakespeare - from Macbeth Act Scene