古人有言∶病卧于床，委之庸医，比于不慈不孝。是以为人父子者，不可以不知医。虽
然，医岂易知乎哉！知其浅而不知其深，犹未知也；知其偏而不知其全，犹未知也。以卑鄙
管窥之见，而自称神良，其差误殆有甚焉。予少多病，每HT 疾则缠绵难愈。因尔酷嗜医学
潜心玩索者有年，而四方求治者日益繁，四方从游者日益众。然此衷常栗栗危惧，
凡书理有未贯彻者，则昼夜追思；恍然有悟，即援笔而识之。历今三十载，殊觉此道精微。
思贵专一，不容浅尝者问津；学贵沉潜，不容浮躁者涉猎。盖以上奉君亲，中及HT 友，下逮
卑幼，性命攸关。其操术不可不工，其处心不可不慈，其读书明理，不至于豁然大悟不止。
爰作是书，以教吾徒，而名之曰《医学心悟》。盖警之也。然心悟者，上达之机；言传者，
下学之要。二三子读是书，而更加博览群言，沉思力索，以造诣于精微之域，则心如明镜，
笔发春花，于以拯救苍生，而药无虚发，方必有功。仰体天帝好生之心，修证菩提普救之念
俾闾阎昌炽，比户安和，永杜夭札之伤，咸登仁寿之域。岂非业医者所深快乎！况为父者
知此可以言慈；为子者，知此可以言孝。以之保身而裕如，以之利人而各足，存之心则为
仁术，见之事则为慈祥，尤吾道中所当景慕也。二三子识之，予日望之。
时
雍正十年孟春月吉旦 天都普明子程国彭钟龄自序
古人有句话说：生病卧床，却把性命托付给平庸的医生，这比不慈爱和不孝顺还要严重。因此，作为父亲和儿子的人，不能不懂医学。虽然如此，医学难道容易精通吗？只知道浅显的道理而不知道深奥的道理，等于还不知道；只知道片面而不知道全面，也等于还不知道。以卑陋浅薄的管窥之见，却自称医术神妙良善，其造成的差错失误恐怕更加严重。我年轻时多病，每次生病都缠绵难愈。因此我酷爱医学，潜心钻研探索多年，前来求治的人日益繁多，跟随我学习的人也日益众多。然而我的内心常常战战兢兢、充满敬畏，凡是书中医理没有彻底贯通的地方，就日夜追思；忽然有所领悟，就提笔记录下来。到现在已经三十年，越发觉得医学之道精微深奥。思考贵在专一，不容许浅尝辄止的人去问津；学问贵在深沉潜修，不容许浮躁轻率的人去涉猎。因为上可奉养君主和父母，中可惠及朋友，下可照顾晚辈，关系到性命存亡。其操作技术不可不精巧，其用心不可不仁慈，其读书明理，不到豁然大悟的地步绝不罢休。于是撰写了这本书，用来教导我的学生，并命名为《医学心悟》。这是为了警示他们。然而内心的领悟，是向上通达的关键；语言的传授，是向下学习的重要方法。你们这些学生读了这本书，再进一步博览群书，沉思强力探索，以达到精微的境界，那么心如明镜，笔下生花，从而拯救百姓苍生，用药没有虚发，处方必定有效。仰体上天爱惜生命的心意，修养证悟菩提普救众生的念头，使民间昌盛兴旺，家家户户平安和谐，永远杜绝早夭疾病带来的伤害，全都进入仁爱与长寿的境界。这难道不是从事医疗行业的人所深深感到快乐的事吗？况且做父亲的懂得这些可以称为慈爱；做儿子的懂得这些可以称为孝顺。用这些来保全自身则从容自如，用这些来利益他人则各自充足，存在于心中就是仁爱之术，表现在行事上就是慈祥，尤其是我道中所应当景仰羡慕的。你们这些学生要记住，我每天都在盼望。
时雍正十年孟春月吉旦 天都普明子程国彭钟龄自序
The ancients said: "To lie ill in bed and entrust one's life to a mediocre physician is worse than being unfilial and unkind." Therefore, those who are fathers or sons must not be ignorant of medicine. Nevertheless, is medicine easy to master? To know only the superficial and not the profound is still to know nothing; to know only the partial and not the whole is still to know nothing. With humble and shallow insights limited like looking through a tube, yet claiming divine skill and excellence, the errors and mistakes made would likely be even more severe. In my youth, I suffered from frequent illnesses, and each time I was sick, it lingered and was difficult to cure. Thus, I developed a keen passion for medicine, dedicating myself to deep study and exploration for many years. As a result, those seeking treatment from me increased daily, and those following me as students also grew numerous. However, my heart remained perpetually trembling with awe and fear. Whenever there were medical principles in books that I had not thoroughly comprehended, I pondered them day and night. When sudden enlightenment came, I immediately took up my pen to record it. Thirty years have passed since then, and I increasingly feel that the Way of Medicine is subtle and profound. Thought must be focused and singular, allowing no room for those who dabble superficially; learning must be deep and immersive, allowing no room for the frivolous and restless to skim the surface. This is because, on one hand, it serves rulers and parents; in the middle, it benefits friends; and below, it reaches the young and inferior. Life and death are at stake. One's technical skills must not be unrefined, and one's mindset must not be uncompassionate. One must read books and understand principles until achieving sudden, great enlightenment. Therefore, I composed this book to teach my disciples and named it *Yixue Xinwu* (Medical Insights). This is intended as a warning. However, insight from the mind is the key to ascending to higher understanding; verbal transmission is the essential method for lower-level learning. You, my students, having read this book, should further extensively read various texts, contemplate deeply, and strive vigorously to reach the realm of subtlety. Then your minds will be like clear mirrors, and your writing will bloom like spring flowers. By doing so, you can save the common people, ensure that every prescription is effective, and that every formula achieves its purpose. Aligning with the Heavenly Emperor's desire to preserve life, and cultivating the Bodhisattva's vow to universally save beings, may the villages flourish, and may households live in peace and harmony. May we forever prevent injuries caused by premature death and disease, and may all attain the realm of benevolence and longevity. Is this not what those engaged in the medical profession should deeply rejoice in? Moreover, if fathers understand this, they can practice kindness; if sons understand this, they can practice filial piety. Using this to preserve oneself brings ease and confidence; using this to benefit others brings sufficiency. Stored in the heart, it is the Art of Benevolence; manifested in action, it is kindness and compassion. These are particularly worthy of admiration within our path. Remember this, my students, and I look forward to it daily.
Written on an auspicious day in the first month of the tenth year of the Yongzheng reign, by Cheng Guopeng, styled Zhongling, known as Tian Du Puming Zi, in his own preface.