 He Yan affirms in his Lunyu commentary that the inborn “xing-nature is that which human beings have been endowed with, and which enables them to live” (5.13). This is to be understood in terms of qi, which also accounts for a person’s “capacity” (cai) (commentary to Lunyu 15.29). In this context, the concept of cai is given a wide remit, encompassing the full range of talent and ability such as physical endowment, intelligence, and emotional and moral capacity. Xuanxue scholars debated hotly on the relationship between a person’s nature and capacity, of which more will be said later.