Witches

• • "Fair is foul and foul is fair" (Act 1)
• • Trochnio tetramotor: 


  They speak in trochaic tetrameter, which is distinct from the iambic pentameter that noble characters speak in throughout the play, this gives their speech an eerie songlike quality. This unnatural manner of speech compounds their duplicitousness as even their speech transcends the earthly realm. Consequently, this makes it easier for them to tap into the supernatural realm to successfully employ their oral deceptions.
• • Banquo's later characterisation of them as "instruments of darkness" underscores their sinister musicality, implying that their conflicting words possess a hypnotic allure, particularly for Macbeth.