The Question and Answer section for Macbeth is a great resource to ask questions, find answers, and discuss the novel.
I suppose the irony is dramatic. Lady Macbeth sets out a plan for she and her husband to present themselves as loving subjects and yet they are underneath, as the audience knows, ready to murder the king. This is dramatic irony because we know...
Reread Lady Macbeth's soliloquy, lines 35-51 in scene 4 and Duncan’s reaction lines in scene 6. Why does she ask the spirits to fill her with “direst cruelty” and “make thick my blood”? What does this speech reveal about her
Lady Macbeth is asking the spirits to provide her with strength..... the strength she will need to do murder.
Macbeth is horrified and laden with guilt. Lady Macbeth is a rock...... for the time being.