every proverb has a story .the story is the source of the proverb .in fact ,you can simply regard it as a word .but the difference is the word has story.for example,san ren cheng hu/yi xiao da fang/qian li zhi ti,kui yu yi xue.for english example ,when the army almost wins,but at the end ,it fails.then you can sighs :qian li zhi ti ,kui yu yi xue.