In his book Like the Flowing River, Paulo Coelho tells the story of visiting a ruined castle near Olite, Spain. A man at the door tells him, "You can't come in." Coelho's inituition suggests the man is saying this purely for the pleasure of saying "No!" So he offers the man a tip, tries being nice and points out that it is, after all, a ruined castle. "You can't come in," the man insists.
Coelho decides the only alternative is to see if the man will physically prevent him from entering the castle. He walks towards the door and the man looks at him, but does nothing.
As Coelho is leaving, two other tourists walk into the castle. The old man does not try to stop them. Coelho writes that he thinks - thanks to his resistance - the old man decided to stop inventing ridiculous rules. "Sometimes the world asks us to fight for things we do not understand and whose significance we will never discover," Coelho notes.