Notire Basura once came upon two monks who were angrily scowling at one another and shouting "fool! fool!" 

Pausing for a moment, one of the monks approached Notire, and bowing politely, asked , 

"Venerable sir, by what criteria should one identify a fool?"

"Only a fool should identify a fool," Notire said. "All others should respect his folly as a form of wisdom not yet revealed." 

The monk bowed politely and departed.