Qi is the source of all world phenomena. It is the vital component of everything, the very basis of appearance. Qi flows and is contained in every level of existence - within the vast infinity of the universe, within stones, minerals, life forms, molecules, atoms, etc. It provides the stability and connectivity in all material, and non-material forms, and animates the forms of the world.
It is impossible to give a steady definition of the concept of Qi. Therefore we will let the various translations further clarify.
Qi:
"vapor", "air", "breath",
“matter”, “energy”, “material energy”,
“vital power”, “life force”...
YS
Zhang, Enqin (1990). Basic Theory of Traditional Chinese Medicine. Shanghai: Publishing House of Shanghai College of Traditional Chinese Medicine
Maciocia, Giovanni (1989). The Foundations of Chinese Medicine. Edinburgh: Harcourt Publishers Limited
Related Articles:
The Concept of Qi in Chinese Medicine