Emptying the Heart: Daoist Alchemy and Neiguan

“The heart is called empty, for emptiness has nothing to do with impressions already gathered, but with what is going to be received.The heart is alive, and it possesses knowledge; it knows, and from knowing makes distinctions. To make distinctions is to know all parts of the whole at once.” (Xunxi, Jie Bi, 300BC) Wow, if