水至清則無魚（水至清則無魚）　

◎ 水至清則無魚 shuǐ zhì qīng zé wú yú

[when the water is very clear,there will be no fish—one should not demand absolute purity] 源自《大戴禮記》:“水至清則無魚,人至察則無徒。”意謂水太清了,魚便不能活。現(xiàn)用來告誡人們對(duì)人對(duì)物不可有過高的要求