“The pure Yang forms the heaven, and the turbid Yin forms the earth. The Qi of the earth ascends and turns into clouds, while the Qi of the heaven turns into rain.” Chinese MedicineTcmQi Quotes Book:The Yellow Emperor's Classic of Medicine: A New Translation of the Neijing Suwen with Commentary Source: The Yellow Emperor's Classic of Medicine: A New Translation of the Neijing Suwen with Commentary