The Ling Shui is the Han dynasty classic on acupuncture. Ling
Shui can be translated as the spiritual axis or spiritual
compass. As a compass, it can identify a current location and
reveal the way to a destination. This classic book presents a
model for understanding existing health conditions, as well as
offering directions and guidance to find health, longevity and
spiritual realization. Chapter 54 of the Ling Shu: The Allotted
Year of Human's Life, offers advice on the meaning of spirit
(shen). Qi Bo states "when one's blood and energy are complete
and harmonized, when nourishing and protective qi are complete
and penetrating, when the five viscera are complete and matured,
the spirit qi is sheltered in the heart and mind, the animal
spirit and human soul complete the organs, the person is
complete." Blood, nourishing qi and the animal spirit are Yin.
Qi, Wei Qi and the human soul are Yang. The heart and mind are
Yang and the organs are Yin. A meaning of this description of
spirit is: when Yin and Yang are