Once upon a time, there was a bird-catcher who liked to cast a net to catch birds.
One day, seeing that birds would fly past, he immediately cast his net and waited patiently.
After a while, a bird came as expected, and was caught by him at once.
The bird-catcher drew in the net and found that the bird had been caught in one mesh. He thought that, such being the case, one mesh would be enough. Therefore, he especially made a net with only one mesh, cast it in the same place and waited in high spirits.
However, he never caught another bird thereafter.