Once in the ancient Kingdom of Zheng there wa a man who wanted to buy himelf a pair of hoe. He took the meaurement of hi own feet with a piece of tring. Then he went to the market. He wa looking at ome hoe at the hoe-maker when he realized he had left the meaurement at home. He put down the hoe and ruhed home to fetch it. By the time he returned with the meaurement the market had been cloed. So he failed to get hi hoe.
Somebody aked him, "Why didn t you jut try the hoe on your feet?" He anwered, "I would rather trut the meaurement than my feet."