《黄帝内经·素问·五藏别论》
凡治病，必先观察其上、下的变化，诊查其脉候的虚实，查看其情志精神的状态，还要辨别其疾病情况。
凡治病必察其上下，适其脉，观其志意，与其病也。
When treating diseases, one must first observe the changes in the upper and lower, examine the deficiency or excess of the pulse, check the state of the emotions and spirit, and also differentiate the disease.