《黄帝内经·素问·本病论》
黄帝说：我想听听关于气交相遇、相会、相胜、相抑的原因，变而为疾，其病情轻重是怎样的呢？
帝曰：愿闻气交遇会胜抑之由，变成民病，轻重何如？
The Yellow Emperor said: I would like to hear about the causes of the encounter, meeting, victory, and restraint of the qi exchange, and how the severity of the disease varies when it changes into a disease.