Dagger scene

If I was the director of Macbeth I would not use a dagger at all during the dagger speech to show that Macbeth is mad. Mine eyes are made the fools o'th'other senses (2.1.44). this shows that Macbeth's eyes say that he does have the dagger. His other senses say that he does not have the dagger. I believe that Macbeth is mad because he is imagining things that are not there.