Searching for the key under lamplight
The joke shows people searching where investigation is easy or familiar rather than where the answer is likely to be. Method is chosen for its convenience instead of its relevance to the problem.

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The joke shows people searching where investigation is easy or familiar rather than where the answer is likely to be. Method is chosen for its convenience instead of its relevance to the problem.
For years a border guard searches Nasrudin's saddlebags and finds only straw, yet Nasrudin keeps getting richer. Scrutiny focused on the expected contents misses what is in plain sight, because the observer's frame decides what counts as evidence.
Nasrudin arrives at a feast in rags and is ignored. He comes back in a fine coat, is seated with honor, and then spoons food into the coat, saying it was the coat that was invited. The story shows that social treatment often responds to status signals rather than to the person. It makes that hidden transaction visible by acting it out literally.
Shah presents the Nasrudin jokes as deliberately built Sufi teaching stories. On his account, the absurdity jolts the reader out of habitual patterns of thought, and each story holds layers of meaning that open up as the reader develops. The stories work as sharp observations of cognitive habits whether or not that esoteric purpose was ever intended.