《黄帝内经·素问·至真要大论》
所以作为一个治病的医生，必须明了六气所司的气化，以及五味、五色的产生与五脏之所宜，然后才可以对气化的太过、不及和疾病发生的关系有了头绪。
故治病者，必明六化分治，五味五色所生，五藏所宜，乃可以言盈虚病生之绪也。
Therefore, as a doctor treating illnesses, one must understand the qi transformations controlled by the six qi, as well as the derivation of the five flavors and five colors and that which the five viscera need; only then can one understand the relationship between excessive and deficient qi transformations and the occurrence of illness.