By the pricking of my thumbs,
Something wicked this way comes.
– William Shakespeare
Macbeth, Act 4, Scene 1. The Second Witch says this with some irony as she senses the approach of Macbeth and describes him as “wicked” – she and her sisters are also wicked! Macbeth now resembles the Witches and his evil is indistinguishable from theirs. This quote represents the theme of the supernatural, since the Witches’ supernatural nature can feel Macbeth’s evil presence even before he arrives.