O proper stuff!
This is the very painting of your fear:
This is the air-drawn dagger which, you said,
Led you to Duncan. O, these flaws and starts,
Impostors to true fear, would well become
A woman’s story at a winter’s fire,
Authorized by her grandam. Shame itself!
Why do you make such faces? When all’s done,
You look but on a stool.
– William Shakespeare
Macbeth, Act 3, Scene 4. An unimpressed Lady Macbeth rebukes her husband over his irrational behavior and paranoia after he claims to have seen Banquo’s ghost sitting on his stool. She tells him that his mind is playing tricks on him, just as he imagined the supernatural vision of the floating dagger that led him to Duncan. She tries to shame him over his irrational fears by saying that he is simply looking at a stool.