 The ears, the eyes, and all the other bodily organs desire those things on which our physical nature (qizhi zhi xing) depends for nourishment. The so-called human desires of human nature originate from the Way of the formation and transformation of heaven-and-earth (tiandao). In the case of humanity, they are rooted in human nature and expressed in daily affairs. In this sense, they constitute the Way of humanity (rendao). (Chung-ying Cheng 1971: 76). 