So an herb may have a totally different effect if is used with another herb. Many people try to steal a doctor s herb formula but the condition changes all the time. You could need a totally different formula after a few days. You need a doctor to look at the patient, check the pulse, look at the tongue. Chan Acupuncture is more Yang in the sense that it works form the outside in.
Herbs are more yin in the sense that they work from the inside out.
I like to think of acupuncture as sort of the hyphen between body and mind. That it inherently balances the two. The Chinese or Oriental framework is such that it incorporates Mind, spirit or Emotion or psychology and body together. Its hard to explain exactly what happens. But there is an acceptance that these aspects of selves no longer have to be separate.