This Chapter from the Yellow Emperor's Classic of Internal Medicine discusses ancient and modern medical practices. Ancient healers focused on spiritual harmony and qi manipulation to treat illness, while modern practitioners relied more on pharmaceuticals and invasive procedures. The text highlights the importance of observing a patient's pulse and complexion to understand their condition and advocates for a holistic approach that considers seasonal rhythms and the patient's mental state. Harmony and alignment with natural cycles are presented as crucial for successful treatment. Ultimately, the text emphasizes the significance of a unified approach that respects the patient's inner balance.