《黄帝内经·素问·刺志论》
脉充实的，血也充实，脉虚弱的，血也衰虚，这是一种正常的现象，与此相反的，就是一种病态。
脉实血实，脉虚血虚，此其常也，反此者病。
When the pulse is full, the blood is also full; when the pulse is weak, the blood is also weak. This is a normal phenomenon. The opposite of this is a pathological condition.