As the fool thinks, so the bell chinks.

The saying suggests that an unwise person makes sense of what they hear or observe according to their own mistaken ideas. Their judgment shapes the message they believe they receive, rather than the thing itself supplying a reliable meaning.

It can also warn that expectation and prejudice distort interpretation. A person may take an ordinary sign as confirmation of a foolish belief, then treat that self-created reading as if it were proof.

Use it for a stubbornly misguided interpretation, especially when someone reads a neutral remark or event as supporting an idea they already hold. It is a pointed figurative rebuke; “fool” is blunt and can sound dismissive when directed at someone.