 Within heaven-and-earth, there is only one qi. Its rise and fall, and comings and goings, are the li. Apprehended by a person… [li] becomes the mind-heart, which is also qi. If qi is not self-governed, why is it that after spring, there inevitably come summer, autumn, and winter? What controls the blossoming and withering of plans, the mildness and ruggedness of the topography, the good and the bad movements of astrological portents, and the birth and growth of humanity and things? All are governed by qi. Since it is self-governed, it is called li. (Huang MRXA: 46) 