《三国志·蜀书·杜周杜许孟来尹李谯郤》
他颇为通晓天文之术，但不是很留心，诸子的文章不是他所留意的，所以没有全部阅读。
颇晓天文，而不以留意；诸子文章非心所存，不悉遍视也。
He was well-versed in astronomy, but he didn't pay much attention to it. The articles of the Confucian scholars were not in his interest, and he did not read all of them.