Macbeth Dagger Scene (Mad or Sane)

In Macbeth scene one act two Macbeth is clearly mad. Lady Macbeth Has just gone to the kings chamber to drug the guards while Macbeth waits patiently for her to give the signal. Macbeth 'sees' an imaginary dagger floating in front of him and that's when the famous dagger scene starts. "Is this a dagger which I see before me/ The handle toward my hand?" 2.1.33-34. Macbeth sees this dagger offering itself to him to aid in the murder of the king. "Or art tho but/ A dagger of the mind, a false creation," 2.1.37-38. Macbeth realized that the dagger could be an illusion, that the stress of killing the king is making him hallucinate. Macbeth is mad, throughout the play there are many passages that question Macbeth's sanity. The dagger scene is the one that where most readers know that he is indeed mad.