《资治通鉴·汉纪·汉纪六》
学习礼义与开发智力同步进行，一起增长，所以无论如何切磋都无愧于心；接受教化与思想见解一起形成，所以道德礼义观念就如同天生本性一样。
习与智长，故切而不愧；化与心成，故中道若性。
Learning about propriety and righteousness and developing intelligence proceeded together and grew together, so everything he learned was in accordance with his heart; his moral and ethical values were formed at the same time as his education, so his values were like his inborn nature.