《宋史·列传·卷一百四十八》
汉、唐之事不用说，靖康、明受之祸距今不远，一定要对他们加以制裁、限制，不让他们达到极盛程度，那么国家可以免去以前出现过的灾祸，宦官又保住了他们的富贵。
汉、唐勿论，靖康、明受之祸未远，必有以裁制之，不使至极，则国家免于前日之患，宦官亦保其富贵。
The events of the Han and Tang dynasties need not be mentioned; the disasters of Emperor Qinzong of the Song dynasty and Emperor Zhu Qizhen of the Ming dynasty are not so far in the past. It is imperative to impose restraints on them and not allow them to reach extreme flourishing; then, the country can avoid the calamities that have occurred in previous times, and the eunuchs can, moreover, keep their wealth and honors.