Ancient texts? 50 years in the same language can make things require considerable context or background knowledge.
For religious ones then the rich man entering heaven as camel passing through a needle thing is supposedly that one of the gates to the city was known as needle owing to narrowness and thus would have to unpack and repack (at difficulty/annoyance rather than impossibility).
Though a favourite was a nurse working the mental wards had to intercede on the behalf of a patient almost sectioned because he used an old phrase from a poem ("about as likely as a cow jumping over the moon", ending line from dish ran away with the spoon that most children would have heard, especially back then) and the doctor had not heard of it and thought it instead a bizarre detachment from reality.