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Inferential Foundations of Epicurean Ethics - Article By David Sedley

  • Cassius
  • January 22, 2026 at 2:28 PM
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    • January 22, 2026 at 2:28 PM
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    In researching other issues I came across this article by David Sedley: Inferential Foundations of Epicurean Ethics

    While I have some issues with the first section, but that's only a brief summary of Epicurean ethics and not essential to the main point of the article. The main part thrust of the article is to examine how Epicurus constructed his argument that in ethics good and bad divides into pleasure and pain in much the same way that in physics everything int he universe divides into bodies and space.

    Sedley agrees with DeWitt in pointing out that we need to be careful in interpreting Cicero as to "the highest good." Sedley writes: "The phrase summum bonum occurs literally hundreds of times in Cicero’s philosophical writings, yet it is by no means clear to me what Greek term it could represent. "

    Here's the full section:

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    Now as far as the actual expression summum bonum is concerned, there is nothing new or surprising about finding it here. Pleasure was introduced at the outset, back in the Cradle Argument, as the summum bonum, and pain as the summum malum. The phrase summum bonum occurs literally hundreds of times in Cicero’s philosophical writings, yet it is by no means clear to me what Greek term it could represent. Expressions like ‘the ultimate good’ (to eschaton tōn agathōn) and ‘the primary good’ (to prōton agathon) are far too rare in Hellenistic philosophy to account for such frequent occurrence. My own guess is that summum bonum is in most cases simply Cicero’s rendition of ‘the good’ (to agathon). When one looks through the contexts in which it occurs, the overwhelming majority are ones in which the mere word bonum would, in the absence of a Latin definite article, have been ambiguous between ‘the good’ and ‘a good’. For instance in the Cradle Argument, where all animals rejoice in pleasure ‘as in the highest good’ (ut summo bono), a mere ‘as in the good’ (ut bono) would have been indistinguishable from ‘as in a good’.²⁸ The addition of summum before bonum neatly removes the ambiguity.

    Let us take it, then, that summum bonum in Fin. 1.40–1 just represents ‘the good’. For an Epicurean, to call pleasure ‘the good’ is to label it, if not strictly as the only good thing, at least as the only underivatively good thing, that by courtesy of which other things are good—in other words, the ethical end (telos). But the present passage goes further than that. The thing labelled the summum bonum (and also, more elaborately, the highest (summum) or ultimate (ultimum) or extreme (extremum) of goods, which the Greeks call telos) is not pleasure tout court, but the pleasant life (iucunde vivere, or cum voluptate vivere), the very life amply filled out with a portrayal of the ideal Epicurean. To see what has happened, we need here a distinction between a primitive and a substantive account of the good or the telos. In Aristotle, for instance, the primitive account is simply eudaimonia, or perhaps ‘activity of the soul in accordance with virtue’, while the substantive account would be a detailed analysis of this as acted out in the civic life, the contemplative life, or both. What has happened in the course of Torquatus’ speech is not a shift in the meaning of summum bonum, but a shift from the primitive to the substantive specification of what it consists in. Is this legitimate? How can Torquatus assert that the Epicurean life is the best possible life, when he has not yet even dealt with the question whether virtue has a place in it; or with the relation of mental to bodily pleasure; or with the lessons of physics for dealing with fear of death and god; or with the function of friendship?


    But regardless of that, the more pressing point is that we may well have been locked by the term "highest good" into thinking that Epicurus advocated for some particular pleasure as the goal and that there are a larger number of "inferior" pleasures that should be flatly avoided.

    To me the more likely alternative is that Epicurus was, as Sedley states, looking first to establish what is good vs what is bad in blanket terms, in the same way he offset bodies vs space in blanket terms, and only thereafter is it significant to look at the implication of further details.

    I unfortunately have to point out that Sedley disagrees with Gosling & Taylor's "Greeks on Pleasure" as to the katastematic/kinetic issue, and that means he would also disagree with Emily Austin's position in "Living for Pleasure" (Chapter 4 Note eight) where she wrote:

    This is a non-specialist text, so I have chosen not to wade into the dispute about katastematic and kinetic pleasures in the body of the text. A specialist will recognize that I am adopting a view roughly in line with Gosling and Taylor (1982) and Arenson (2019). On my reading, katastematic pleasures are sensory pleasures that issue from confidence in one’s ability to satisfy one’s necessary desires and an awareness of one’s healthy psychological functioning; choice-worthy kinetic pleasures are the various pleasures consistent with maintaining healthy functioning, and those pleasures vary, but do not increase healthy psychological functioning. (emphasis added)

    In fact in this section Sedley says flatly that "Katastematic pleasure is the absence of pain." I very much disagree with that and think it is far too overbroad, because it explicitly states that they are the same thing. Following the argument in the rest of Sedley's article, I would argue that Epicurus' analysis follows the pattern of contrasting bodies against space, and that he then sets off pleasure against pain. I would say that if Sedley wanted to discuss kinetic and katastematic pleasure within this article at all, he should have said:

    "Pleasure is the absence of pain. Of the pleasures, Epicurus mentions two categories, kinetic and katestematic, the first of which requires stimulation, the other of which does not require stimulation..... He could then have proceeded to further discussion from there. That would have preserved the main point of the article, which is that just as in physics Epicurus establishes first and foremost that everything divides into bodies and space, in ethics Epicurus establishes first and foremost that everything divides into pleasure and pain.

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    • January 22, 2026 at 8:30 PM
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    How does he respond to Lucretius' use of Summum Bonum in the early lines of Book 6?

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    • January 22, 2026 at 8:34 PM
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    Quote from Joshua

    How does he respond to Lucretius' use of Summum Bonum in the early lines of Book 6?

    I dont recall that he mentions that. And in fact as I read it he's not really being critical of Cicero's choice to use "summum bonum." I gather what he's saying is that it makes perfect sense in Latin to do it the way Cicero did it.

    The problem arises because in our English expectation anything translatable as "highest good" implies "the highest single good among many goods."

    I gather Sedley is saying we should not infer that summum bonum is a statement as to one among many things. Rather Sedley is seeing it as a reference to "good" as a class, which is singular, without implying anything about how many particulars are in that class.


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    Let us take it, then, that summum bonum in Fin. 1.40–1 just represents ‘the good’. For an Epicurean, to call pleasure ‘the good’ is to label it, if not strictly as the only good thing, at least as the only underivatively good thing, that by courtesy of which other things are good—in other words, the ethical end (telos).

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    • January 22, 2026 at 8:53 PM
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    As an aside here Joshua I think we are seeing in going through Tusculan Disputations how important it was to Cicero (and presumably the Stoics) to say that there is only a single good - virtue - and that nothing else is truly good. That allows them to argue that being virtuous is totally within our control and that means that having what is good is totally within our control.

    In contrast Sedley argues that Epicurus was approaching ethics like he was approaching physics. This implies Epicurus thought it essential to first and foremost establish that there is a bright line separating good from bad in general, just like there's a sharp distinction between bodies and space. Once you establish a position that there are only two options, you can categorize everything within one of the two options and rule out the existence of anything else (endless "what-aboutism" leading to radical skepticism).

    And Sedley observes that in both lines of argument, Epicurus follows up this "either/or" starting point by arguing that other philosophers are wrong in asserting the existence of anything of any nature that falls outside that "either one or the other" structure.

    It's pretty easy to see that this has major advantages in defending the senses and opposing radical skepticism. Skeptics are going to reject the analysis anyway, but it gives those of us who accept the legitimacy of the division a very firm starting point for rejection of otherworldliness - leading to the confidence that Cicero dislikes but cites as an Epicurean trait.

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    • January 23, 2026 at 1:15 PM
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    And Sedley observes that in both lines of argument, Epicurus follows up this "either/or" starting point by arguing that other philosophers are wrong in asserting the existence of anything of any nature that falls outside that "either one or the other" structure.

    Not only do I reject the Ethical side of this argument except insofar as it is restricted exclusively to pathos, I also notice that this is exactly the kind of absolutism that Cicero employs himself:

    Quote

    There is indeed a law, right reason, which is in accordance with nature; existing in all, unchangeable, eternal. Commanding us to do what is right, forbidding us to do what is wrong. It has dominion over good men, but possesses no influence over bad ones. No other law can be substituted for it, no part of it can be taken away, nor can it be abrogated altogether. Neither the people or the senate can absolve from it. It is not one thing at Rome, and another thing at Athens: one thing to-day, and another thing to-morrow; but it is eternal and immutable for all nations and for all time.

    ***

    For Justice is one; it binds all human society, and is based on one Law, which is right reason applied to command and prohibition. Whoever knows not this Law, whether it has been recorded in writing anywhere or not, is without Justice.

    So I say again, it is no good blaming Cicero for this!

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    • January 23, 2026 at 2:00 PM
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    Joshua it would probably help people reading along if you could elaborate on these two when you get time:

    Quote from Joshua

    Not only do I reject the Ethical side of this argument except insofar as it is restricted exclusively to pathos, I also notice that this is exactly the kind of absolutism that Cicero employs himself:

    At least as I am understanding the discussion, all we are talking about here is that Epicurus held there to be only two feelings, pleasure and pain, and every feeling of every kind falls within one or the other categories. That might be read by some people to be a form of absolutism, but you specifically say that you are not talking about pathos so I don't think you mean to be read as saying that Epicurus was engaging in the kind of absolutism to which we all object.. agree that Cicero is being an absolutist in his (and the Stoics) rankings of good and bad by a criteria other than pleasure and pain.

    So it would probably be good to clarify what you mean in referring to "the ethical side of this argument (?)

    Quote from Joshua

    So I say again, it is no good blaming Cicero for this!

    Again someone may ask what "this" refers to in terms of blaming someone for something.

    I don't think Sedley is "blaming" Cicero and in fact he's endorsing his terminology. And if a Latin / Greek scholar like Sedley can say that using "summum bonum" for "the good" is good Latin, then I would not hazard to disagree.

    So if there's any "blame" to go around as to "summum bonum," that blame doesn't belong to Cicero or Sedley or Dewitt but to modern confusion. if there's blame to assign, it is to those people who read "highest good" as "highest pleasure" and think that this means there's a specific pleasure that's the highest. That's what I read a lot of people to be doing with "katastematic pleasure" or "tranquility" or even "ataraxia" or "aponia" and that's why object so strongly to reaching those conclusions, which are almost everywhere in modern writing about Epicurus.

    I'm reading Sedley's point to be that in using summum bonum Cicero was just intending to translate Epicurus saying essentially "the good is pleasure" in the sense of "the good is pleasure as a class of feelings."

    The problem comes when people start reading "summum bonum / highest pleasure" to mean a particular type of pleasure when Epicurus has not said that. He's talking about pleasure as a class, not a specific mental or physical pleasure.

    Now if there are sections in Cicero where he talks about "summum voluptatem" then that would require further discussion. I wouldn't be surprised if Cicero said exactly that when he debates Torquatus in Book Two of On Ends. But even there I would explain that terminology as referring to "the highest degree of pleasure as a class" or "the highest quantity of pleasure as a class" (as in PD03) rather than meaning that Epicurus was singling out a particular pleasure as the single best pleasure.

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    • January 23, 2026 at 2:09 PM
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    other philosophers are wrong in asserting the existence of anything of any nature that falls outside that "either one or the other" structure

    My point is that when it comes to ethics almost everything falls outside of that structure. This is parallel to atomism only by happenstance; there is no Sith rule-of-two that governs every aspect of Epicureanism, or of nature, or of human life.

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    • January 23, 2026 at 2:15 PM
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    Oh Ok good catch! I meant my comment only to apply to the issue of dividing all feelings (all good and bad, since there is nothing intrinsically good but pleasure nor bad but pain) into either pleasure or pain.

    I would not want anyone to read that more broadly so glad you caught it.

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