By updating and philosophically purifying Chinese classical concepts of yin and yang as receptivity and impulsion respectively, heart-mind （xin） can be understood as an emotional thing. This renewed or purified notions of yin and yang can make us better understand conceptual construction of functioning xin, which will lay the sentimental groundwork for xin, belief, desire, value, moral respect, rationality and irrationality. In this case, the Western concept of mind as well as the standard understanding of belief in the analytic philosophy shall be adjusted in a significant way.