《列子·说符》
他们三个人所说的仁义之道恰恰相反，但都是从儒学中来的，哪一个对，哪一个不对呢？ 
彼三术相反，而同出于儒。
The three of them each said the opposite about what the Tao of jen and yi was, but it all came from the Confucian teachings. Which one of them was right and which was wrong?