How are the cognitive and non-cognitive aspects of emotion related?

Most scholars of emotions concede that although cognitive evaluations are essential for emotion, they are not sufficient for it, and that other elements, such as bodily feelings, physiological sensations and behavioral expressions are also required. However, only a few discuss how these diverse aspects of emotion are related in order to form the unity of emotion. In this essay I examine the co-presence and the causal views, and I argue that neither view can account for the unity of emotions. In particular, both views face the problem of fortuitous connection, and, as a result, they fail to identify and distinguish an emotion from other mental states. Consequently, they fail to account for our first person authority over our emotions. I finally argue that only an internal, conceptual relation between the cognitive/evaluative and affective/physiological aspects of emotion can avoid such problems, and suggest that the Aristotelian distinction of form and matter can provide such internal relation.