Senses
它山之石，可以为错/ 它山之石，可以為錯 to use others' advice for improvement
literally meaning stones from other hills can be used to polish jade; used as a metaphor for using advice, criticism, or outside help to improve oneself or correct one's faults
它山之石，可以为错/ 它山之石，可以為錯 benefit from others
stones from other hills can serve as a grindstone; literally means that advice or external help can be used to improve oneself or remedy one's shortcomings