It is a commonplace that emotions are characteristically passive. As we ordinarily think of them, emotions are ways in which we are acted upon, that is, moved or affected by aspects of our environment. Moreover, we have no voluntary control over whether we feel them. In this paper, I call attention to a much‐neglected respect in which emotions are active, which is no less central to our pretheoretical concept of them. That is, in having emotions, we are engaged with the world insofar as we respond to aspects of our environment. In this context, to say that an emotion is a response to x is tantamount to saying that x is a reason for which we have it. Elaborating this claim in light of a historically prominent conception of the active/passive distinction, I will argue that emotions are a form of spontaneity in virtue of their responsive character and contrast in this respect with perceptions, which are fundamentally receptive. While this proposal is prima facie opposed to the ordinary image of emotions as passive, I will show that it actually allows us to make proper sense of it.