《后汉书·列传·刘虞公孙瓚陶谦列传》
有人间他原因，公孙瓒说： 我以前在塞外驱逐叛胡，在孟津扫荡黄巾，当那个时候，认为天下稍作指挥就可以平定。
或问其故。瓚曰： 我昔驱畔胡于塞表，埽黄巾于孟津，当此之时，谓天下指麾可定。
Some men have other reasons. Gongsun Zan said, "I used to expel the rebels from the border and sweep away the Yellow Turbans in Mengjin. At that time, I believed that the天下 could be pacified with a little command.