  Spinoza reserves the term ‘imagine’ [imaginor] for the description of conscious states, so IIIp28 describes, at least in part, the objects of desire. If I imagine that coffee will lead to joy, then I will desire that joy and so that coffee. IIIp28, strictly speaking, is not an exhaustive characterization of objects of desire. It implies only that we desire anything which we imagine will lead to joy and are averse to whatever we imagine will lead to sadness and not that we might not have other kinds of desires also, desires unrelated to either joy or sadness. A review of the particular forms of desire Spinoza catalogues in Part III (see, notably, IIIp27c3s, IIIp29s, IIIp40c2s,IIIp41, and IIIp56s) suggests, however, that the view is still stronger than the limited claim of IIIp28: it seems that Spinoza does hold that anything I desire will be a thing which I imagine will lead to joy and that anything I am averse to will be something which I imagine will lead to sadness.