"fair is foul and foul is fair"- ACT 1.1, The Witches
"A dagger of the mind" ACT 2.1, Macbeth
"Beware the thane of Fife" ACT 4.1, The Witches
"Will the line stretch out to the crack of doom" ACT 4.1 Macbeth
"She is troubled with thick coming fancies" ACT 5.3, The Doctor
"Will these hands ne'er be clean" ACT 5.1, Lady Macbeth
In Act Four, the witches "vanish". They are unseen by Lennox, who then enters. Why are all of the supernatural elements of the play seen by Macbeth and sometimes no other characters?
Macbeth indulges the dark forces in the play so they are visible to him
