How to attain oneness through internal affectivity ( neigan )? Divergent responses in the philosophy of the Cheng brothers

This article examines the neo-Confucian response to the question, “How to achieve the state of oneness,” as put forth by Cheng Yi and Cheng Hao. While both philosophers achieve this state through internal affectivity, their interpretations diverge significantly. Cheng Yi views internal affectivity as an inherent goodness that emanates from the pre-manifested mind but warns against emotional instability and desires. He thus rejects the notion of “teaching benevolence through perception.” (yijue xunren) and instead emphasizing the primacy of the unmanifested mind in attaining oneness. Conversely, Cheng Hao stresses the inward perception of bodily sensations and supports “teaching benevolence through perception.” He argues that through sensory arousal and the transformation of vital energy, the mind and body can achieve harmony, thereby embodying the benevolence present in “heaven, earth, and all things.” This divergence in their approaches to oneness reflects their differing responses to Buddhism and contrasting views on human nature.