Traditional scholarship seems not to pay sufficient attention to the fact that Daxue 《大學》 has established a system of ethical and political philosophy on the basis of the idea of xin 心 (heart-mind) whereas the Zhongyong 《中庸》 has argued for the participation of the human person in the creativities of heaven and earth based on the onto-generative nature (xing 性) of the human person. How to explain this fact and interrelate and integrate these two systems become both a historical challenge and a theoretical issue in the understanding of the Confucian philosophy of humanity as we find in the Lunyu 《論語》.