[澡身浴德, zǎo shēn yù déㄗㄠˇ ㄕㄣ ㄩˋ ㄉㄜˊ] to bathe the body and cleanse virtue (成语 saw); to improve oneself by meditation; cleanliness is next to godliness#991924
[他山之石可以攻玉, tā shān zhī shí kě yǐ gōng yùㄊㄚ ㄕㄢ ㄓ ㄕˊ ㄎㄜˇ ㄧˇ ㄍㄨㄥ ㄩˋ] lit. the other mountain's stone can polish jade (成语 saw); to improve oneself by accepting criticism from outside; to borrow talent from abroad to develop the nation effectively