《宋史·列传·卷一百八十七》
假如直接求之于文字，以作为诵说之资，不成为玩物丧志的人就很少了。 又说 ：讲学之要在于深沉缜密，然后气味深长，途径不差。
若直求之文字，以资诵说，其不为玩物丧志者几希。 又曰： 讲学切在深潜缜密，然后气味深长，蹊径不差。
If one simply seeks it directly through texts, in order to use them as material for recitation, then there will be very few who do not become people who waste their time on trivialities and lose their ambition. He also said: “The essence of teaching is to be profound and meticulous, and then the flavor will be deep and lasting, and the path will not be wrong.”