One day a man, hearing that glasses are useful for reading, went to
a shop to buy glasses.
The shopkeeper showed him a pair of glasses, but he asked for
another pair. In this way, he continued trying on many pairs of
glasses, but every time he said. " These are not good. Give me
another pair, please."
At last the shopkeeper, who was getting angry, said," Sir, can you
read at all?" The man answered:" If I could read, why would I want
glasses?"