Abstract
Western philosophy treats cognition/belief/reason and emotion as entirely separable in the mind, but the Chinese concept of heart-mind strongly suggests otherwise. This can be validated by considering what belief involves. All cognitive functioning involves believing something. It is clear that confidence that p is an epistemic emotion, and many dictionaries define confidence as strong belief. Belief thus requires less strongly positive epistemic emotion. It is shown further that all elements in a functioning mind are instances of emotion, and emotion turns out to be a yin/yang phenomenon, where yin and yang are conceived as mutually complementary rather than, more familiarly, as contraries. Irrational or non-virtuous states of xin can be viewed as distortions of yin/yang emotion, and the mind or, better, heart-mind is best conceptualized as an emotional yin/yang entity. The West has a great deal to learn from China.