the constellations in Heaven, as the streams and rivers on Earth,
meridians are housed in human bodies. As Heaven and Earth warm up
in harmony, streams and rivers will calm down. As Heaven cools and
the Earth freezes, the streams and rivers slow down, and vice versa.
So as pathogens enter our meridians, our blood will slow down with
the cold invasions, will boil with heat invasion, will be stirred
up to create "wind" with deficiency.
Each phenomenon in nature may be mirrored in our meridians.
Each pathogenic invasion may appear as a physical sign in our bodies.
For example, "wind" shows itself in the radial pulse as
a fluctuation in amplitude, and as erratic movements in the yin
and yang aspects of the body. In Chinese medicine, doctors quietly
observe the physical signs in three different places and eventually
encounter these phenomena. Acupuncture aims to prevent the symptoms
entering the deeper yin aspect of our bodies.
From: "Huang Di Nei Jing Su Wen:
Nature, Knowledge, Imagery in an Ancient Chinese Medical Text, chpt.