《淮南子·齐俗训》
又有谁能对他们所做的事定是非、别优劣？所以曾子这样说： 同是因敲击船板而发出的声音，鸟听了高飞而去，鱼听了藏入深渊。 
曾子曰： 击舟水中，鸟闻之而高翔，鱼闻之而渊藏。 
Who can decide right and wrong, good and bad in their actions? That is why Zeng Zi said: The same sound is produced by the beating of a boat's side, but when the birds hear it they fly away, and when the fish hear it they hide in the depths.