《论衡·卷十三·别通篇》
人不博览群书，不通古今，不能识别各种事物，不懂得是非，就像眼瞎、耳聋、鼻痈的人一样。
人不博览者，不闻古今，不见事类，不知然否，犹目盲、耳聋、鼻痈者也。
People who do not read extensively, who do not understand ancient and modern times, who cannot distinguish between different things, who do not understand right and wrong, are like people who are blind, deaf, and have nasitis.