I was thinking about the phrase ‘The pot calling the kettle black’. It comes from a time where cooking was done over open fires and cookware would become visibly ashy. (Fun fact: It first appears and was perhaps coined by Cervantes in Don Quixote!)
What are some other idioms that have lost their literal connection to time? What would be a good modern replacement?
“Don’t check the resale value of a gift car” maybe
But presumably a gift horse is worth something as long as it walks. This summer my kid got a “gift car” and it was critical look at both the undercarriage and the resale value. Thank goodness he was only out the cost of a tow and mechanics inspection