《汉书·传·董仲舒传》
臣愚昧不肖，叙述曾听到的，背诵曾学过的，说的是老师教的道理，仅仅能够不忘记罢了。
臣愚不肖，述所闻，诵所学，道师之言，廑能勿失耳。
I am stupid and unworthy, narrating what I have heard, reciting what I have learned, speaking of what my teacher has taught me, I can only not forget it.