 Studying Macbeth, here's how you can analyze Act 3 Scene 2 when Macbeth and Lady Macbeth plots to kill Banquo. Lady Macbeth is keen to know exactly where Banquo is and she asks herself in this interrogatory sentence to keep a track of his movements. She then says these words and basically the rhyming couplet here means that she's saying it's better to kill Banquo and eliminate him as a threat than having her around. Macbeth then enters and this metaphor shows that he wants to eliminate Banquo who he sees as a threat. He then uses this language belonging to the semantic field of terror to show us that he's now really paranoid. Yet Lady Macbeth thinks he's too tense and the caesura hair shows she's asking him to relax. Macbeth agrees and this metaphor shows that he realizes they should make the faces mask to cover what's in their heart. Yet this metaphor and exclamatory sentence shows that Macbeth is really tortured by his paranoia. Yet this exclamatory sentence at the end shows he's confident the murderers will kill Banquo.