一千多年前唐代著名医学家孙思邈著有《大医精诚》一文，他精辟而深刻地指出:“凡大医治病，必当安神定志，无欲无求，先发大慈恻隐之心，誓愿普求含灵之苦，勿避险希、昼夜、寒暑、饥渴、寒暑、疲劳，一心赴救，无作功夫形迹之心。如此可为苍生大医。”
来源：【湖南日报】新湖南客户端通讯员 胡泷予群山环抱之中，吉首大学医学院一间教室内，阳光透过窗户洒在整洁的课桌上。课堂上，老师正声情并茂讲述专业知识，他的声音洪亮而富有激情；学生们或低头思考，或认真笔记，教室里充满浓厚的学术氛围。
The code of conduct for doctors should be one of caution in speech and action， refraining from casual jokes， noise， discussing others' shortcomings， or boasting about their own reputation. They should never slander or attack other doctors to exaggerate their own achievements. When successfully treating a patient， they should not become self-congratulatory or arrogantly satisfied， considering themselves unmatched. These are bad habits that doctors must overcome. Laozi once said， “When a person openly does good deeds， people will naturally repay him;
经常可以看到医院、门诊、特别是中医医疗机构，都会挂有各家的书法作品“大医精诚”，一般大家都会觉得它仅仅是个成语，《大医精诚》作者是唐代的孙思邈，其为京兆华原人，相传为楚大夫屈原的后人，唐代医药学家、道士，被后人尊称为“药王”。
大医精诚是孙思邈《急备千金要方》论述医德的重要文献，是医者必须具备的条件。中医病证有内同外异、又可内异外同、五脏六腑之虚实、血脉荣卫之通塞、阴阳之平衡、28脉象的差异，腧穴流注有高下深浅之差，肌肤筋骨有厚薄强健之异。
