Has anyone written about platonism with regard to emotions? I know that philosophers have written about platonism with respect to beauty and love, and while those are not proper emotions (at least, beauty is not an emotion), experiences of them certainly involve emotion. Has anyone written about platonism regarding, say, sadness? Couldn't a state of affairs be considered, in Plato's language, an instantiation of the form of sad events? Given the role of emotion in moral reasoning and love and appreciation of beauty, it isn't clear to me why platonism wouldn't apply to other instances of emotions.