庄子曾说：“行善不要追求名声，作恶不要触犯刑罚”，这样可以侍奉双亲，可以保养身体，可以享尽天年，这大概说的就是医学吧。我家世代依靠医学作为侍奉父母、保养身体的事业，或许可以避免追求名声和触犯刑罚的祸患。虽然我不确定庄子的话是否就是指医学，但从我家的情况来看，医学确实与庄子的言论有相似之处。比部（刑部官员）履斋曹先生，在官场中恬淡自守，唯独喜爱医书，校对精勤刻苦，我们这些人比不上他。这本书篇幅浩大，流传抄写年代久远，错漏缺失几乎占了一半，如果没有曹先生，这本书几乎无法完成刊印。曹先生轻视官位爵禄，却对“医生”这一名号看得格外郑重吗？至于保养身体、享尽天年，那么在仕途为官与隐居山林之间所得到的益处，简直不可同日而语。玄沙邵弁伟元甫 跋
Zhuangzi said, "Do good without seeking fame; do no evil to avoid punishment." In this way, one can serve one's parents, nourish one's life, and fulfill one's natural lifespan. This seems to refer specifically to medicine. My family has relied on this profession for generations as a means of serving our parents and preserving our health, thereby perhaps avoiding the burdens of seeking fame or incurring punishment. Although I am not certain whether Zhuangzi's words were intended to describe medicine, observing my own family's experience, it is evident that medicine indeed bears resemblance to Zhuangzi's teachings. Mr. Cao Luzhai, an official of the Ministry of Justice (Bubu), remained tranquil in his official career but had a particular fondness for medical texts. His meticulous and arduous proofreading efforts surpassed those of us lesser scholars. This book is voluminous; due to long-standing transmission and copying, errors and omissions account for nearly half of the text. Without Mr. Cao, this work would hardly have been completed. Did Mr. Cao disdain high office yet place great importance on the title of "physician"? As for nourishing life and fulfilling one's natural span, the benefits gained from a career in officialdom versus reclusion in the mountains and forests are incomparable. Postscript by Shao Bian, courtesy name Weiyuan, of Xuansha.