《后汉书·列传·郭符许列传》
有人问他是什么原因，许劭说： 太丘道术太广，广难得周到；仲举性情严峻，峻就不能通达。
或问其故，劭曰： 太丘道广，广则难周；仲举性峻，峻则少通。
Someone asked him the reason, and Xu Shao answered, “Taiqiu's 'Way' is too vast to look after everything, and Zhongju's temperament is too serious, and what is serious cannot be comprehensive.”