“Following nature means following the facts. It means getting the facts about the physical and social world we inhabit, and the facts about our situation in it—our own powers, relationships, limitations, possibilities, motives, intentions, and endeavors—before we deliberate about normative matters. It means facing those facts—accepting them for exactly what they are, no more and no less—before we draw normative conclusions from them. It means doing ethics from the facts—constructing normative propositions a posteriori. It means adjusting those normative propositions to fit changes in the facts, and accepting those adjustments for exactly what they are, no more and no less. And it means living within the facts—within the realm of actual rather than hypothetical norms.”
“Stoic ethics is a species of eudaimonism. Its central, organizing concern is about what we ought to do or be to live well—to flourish. That is, we make it a lemma that all people ought to pursue a good life for themselves as a categorical commitment second to none. It does not follow from this that they ought to pursue any one particular version of the good life, or to cling tenaciously to the one they are pursuing. …Living virtuously is the process of creating a single, spatiotemporal object—a life. A life has a value as an object, as a whole. It is not always the case that its value as an object will be a function of the value of its spatiotemporal parts considered separately. But it is always the case that an evaluation of the parts will be incomplete until they are understood in the context of the whole life. What seems so clearly valuable (or required or excellent) when we focus on a thin temporal slice of a life (or a single, long strand of a life) may turn out to be awful or optional or vicious when we take a larger view. And it is the life as a whole that we consider when we think about its value in relation to other things, or its value as a part of the cosmos.… In our view, a focus on the parts of a life, or on the sum of its parts, obscures some important features of ethical inquiry. One such feature is the extent to which an agent’s own estimate of the value of his life is necessarily inconclusive: others will have to judge his life as a whole, because its character as a whole is not likely to be predictable while he is around to judge it, and because many important holistic considerations, such as its beauty, excellence, justice, and net effect, are things that he is either not well situated to judge or at least not in a privileged position to judge. Another feature obscured is the range of ways in which a single event or characteristic, without wide causal connections to other elements of one’s life, can nonetheless ruin it; for example, the possibility that a monstrously unjust act can indelibly stain a whole life. A third, related obscurity introduced by ignoring a whole-life frame of reference is the extent to which both aesthetic criteria and the notion of excellence have clear roles in the evaluation of a life. The whole-life frame of reference, together with a plausible account of the variety of ways in which a life can be a good one, keeps Stoicism sharply distinct from Epicurean doctrines, or their modern “welfarist” offshoots. How well my life is going from the inside, so to speak, in terms of the quality of my experience, is only one of the things that enters into a Stoic evaluation of it.We hold that there is a single unifying aim in the life of every rational agent, and that aim, guided by the notion of a good life (happiness, eudaimonia), is virtue, understood as the perfection of agency.”