 How do these general considerations about the goal of living translate into an evaluation of actions? When I perform an action that accords with my nature and for which a good reason can be given, then I perform what the Stoics call (LS) a ‘proper function’ (kathêkon, Arius Didymus, 59B) – something that it “falls to me” to do. It is important to note that non-rational animals and plants perform proper functions as well (Diog. Laert., 59C). This shows how much importance is placed upon the idea of what accords with one’s nature or, in another formulation, “activity which is consequential upon a thing’s nature.” It also shows the gap between proper functions and morally right actions, for the Stoics, like most contemporary philosophers, think that animals cannot act morally or immorally – let alone plants.