The Yellow Emperor said: “The principle of Yin and Yang is the foundation of the entire universe. It underlies everything in creation. It brings about the development of parenthood; it is the root and source of life and death; it is found within the temples of the gods. In order to treat and cure diseases one must search for their origins.
“Heaven was created by the concentration of Yang, the force of light; earth was created by the concentration of Yin, the force of darkness. Yang stands for peace and serenity; Yin stands for confusion and turmoil. Yang stands for destruction; Yin stands for conservation. Yang brings about disintegration; Yin gives shape to things.
“The pure and lucid element of light is manifested in the upper orifices, and the turbid element of darkness is manifested in the lower orifices. Yang, the element of light, originates in the pores; Yin, the element of darkness, moves within the five viscera. Yang, the lucid force of light, truly is represented by the four extremities; and Yin, the turbid force of darkness, stores the power of the six treasures of nature. Water is an embodiment of Yin, as fire is an embodiment of Yang. Yang creates the air, while Yin creates the senses, which belong to the physical body. When the physical body dies, the spirit is restored to the air, its natural environment. The spirit receives its nourishment through the air, and the body receives its nourishment through the senses.
“If Yang is overly powerful, then Yin may be too weak. If Yin is particularly strong, then Yang is apt to be defective. If the male force is overwhelming, then there will be excessive heat. If the female force is overwhelming, then there will be excessive cold. Exposure to repeated and severe cold will lead to fever. Exposure to repeated and severe heat will induce chills. Cold injures the body, while heat injures the spirit. When the spirit is hurt, severe pain will ensue. When the body is hurt, there will be swelling. Thus, when severe pain occurs first and swelling comes on later, one may infer that a disharmony in the spirit has done harm to the body. Likewise, when swelling appears first and severe pain is felt later on, one can say that a dysfunction in the body has injured the spirit.
“Nature has four seasons and five elements. To grant long life, these seasons andelements must store up the power of creation in cold, heat, dryness, moisture, and wind. Man has five viscera in which these five climates are transformed into joy, anger, sympathy, grief, and fear. The emotions of joy and anger are injurious to the spirit, just as cold and heat are injurious to the body. Violent anger depletes Yin; violent joy depletes Yang. When rebellious emotions rise to Heaven, the pulse expires and leaves the body. When joy and anger are without moderation, then cold and heat exceed all measure, and life is no longer secure. Yin and Yang should be respected to an equal extent. Is there any alternative,” the Yellow Emperor asked Qi Bo, “to the law of Yin and Yang?”
Qi Bo answered: “When Yang is the stronger, the body is hot, the pores are closed, and people begin to pant; they become boisterous and coarse and do not perspire. They become feverish, their mouths are dry and sore, their stomachs feel tight, and they die of constipation. When Yang is the stronger, people can endure winter but not summer. When Yin is the stronger, the body is cold and covered with perspiration. When people realize they are ill, they tremble and feel chilly. When they feel chilled, their spirits become rebellious. Their stomachs can no longer digest food, and they die. When Yin is the stronger, people can endure summer but not winter. Thus Yin and Yang alternate. Their ebbs and surges vary, and so does the character of their diseases.”
The Yellow Emperor asked, “Can anything be done to harmonize and adjust these two principles of nature?”
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