Definition
This idiom advises against criticizing others for flaws or faults that one possesses themselves.
己身不正，不应评人
He always criticizes others' mistakes, yet he often makes the same ones himself; it's a classic case of 'people who live in glass houses shouldn't throw stones'.
他总是批评别人的错误，但他自己经常犯同样的错误；这就是典型的『住在玻璃屋里的人不应该扔石头』。
Before you criticize her work style, you should examine your own; remember, 'people who live in glass houses shouldn't throw stones'.
在批评她的工作方式之前，你应该先检视自己；记住，『住在玻璃屋里的人不应该扔石头』。
She shouldn't be so harsh on her colleague for being late, as she is often late herself; it's a clear case of 'people who live in glass houses shouldn't throw stones'.
她不应该对同事迟到如此苛刻，因为她自己经常迟到；这就是典型的『住在玻璃屋里的人不应该扔石头』。