Welcome to Episode 358 of Lucretius Today. This is a podcast dedicated to the poet Lucretius, who wrote "On The Nature of Things," the most complete presentation of Epicurean philosophy left to us from the ancient world. Each week we walk you through the Epicurean texts, and we discuss how Epicurean philosophy can apply to you today. If you find the Epicurean worldview attractive, we invite you to join us in the study of Epicurus at EpicureanFriends.com, where we discuss this and all of our podcast episodes.
This week we are continuing our series reviewing Cicero's "Academic Questions" from an Epicurean perspective, which gives us an overview of the issues that split Plato's Academy and helps us understand Epicurus' position on the same issues. This week will continue in Section 19 of Book 2.
Our text will come from
Cicero - Academic Questions - Yonge We'll likely stick with Yonge primarily, but we'll also refer to the Rackham translation here: Cicero On Nature Of Gods Academica Loeb Rackham : Free Download, Borrow, and Streaming : Internet Archive
As we proceed through the end of Academic Questions, these are the topics we expect to cover:
24. Lucullus's Extended Rebuttal of the Academic Doctrine, and His Concluding Appeal to Cicero (2:XIII)
25. Cicero Begins His Reply (2:XX)
26. Cicero Lays Out the Syllogism About Assent and Opinion (2:XXI)
27. Cicero Turns to Antiochus's Own Inconsistency (2:XXII)
28. Cicero Defends His Citation of the Ancient Philosophers (2:XXIII)
29. Cicero Adds Chrysippus and the Cyrenaics, Then Returns to Arcesilas and Zeno (2:XXIV)
30. Cicero Returns to Attacking the Senses (2:XXV)
31. Cicero Presses the Sun's Size and the Limits of Trained Perception (2:XXVI)
32. Cicero Turns the "Art" Argument Back on Lucullus (2:XXVII)
33. Cicero Multiplies Examples From Madness (2:XXVIII)
34. Cicero Attacks Reason and Dialectics: The Sorites Paradox (2:XXIX)
35. Cicero Presses the Liar Paradox (2:XXX)
36. Cicero Presents Carneades's Own Positive Doctrine of Probability (2:XXXI)
37. Cicero Distinguishes the Academic Position From Epicurus's (2:XXXII)
38. Cicero Defends Probability Against the Charge That It Cannot Support Memory or Action (2:XXXIII)
39. Cicero Answers the "Self-Refuting" and "Two Incompatible Propositions" Objections (2:XXXIV)
40. Cicero Broadens the Argument Beyond the Stoics (2:XXXV)
41. Cicero Reflects on His Own Position Among the Competing Schools (2:XXXVI)
42. Cicero's Survey of Disagreement Among the Natural Philosophers (2:XXXVII)
43. Cicero Presses the Problem of Providence and the Limits of Physics (2:XXXVIII)
44. Cicero's Survey Continues: The Soul, the Antipodes, and the Motion of the Earth (2:XXXIX)
45. Cicero Asks Which Natural Philosopher He Would Even Choose to Follow (2:XL)
46. Cicero Turns to Ethics: Even the Gods Are Disputed (2:XLI)
47. Cicero's Roll Call of Rival Schools on the Chief Good, Part One (2:XLII)
48. Cicero's Roll Call of Rival Schools on the Chief Good, Part Two (2:XLIII)
49. Cicero Weighs Zeno Against Antiochus on Virtue and the Happy Life (2:XLIV)
50. Cicero Catalogs the Stoic Paradoxes About the Wise Man (2:XLV)
51. Cicero's Climactic Debate Between Pleasure and Honor (2:XLVI)
52. Cicero Turns to the Canon of Truth, and Zeno's Hand (2:XLVII)
53. The Dialogue's Close (2:XLVIII)
Cassius November 1, 2026 at 9:28 AM
In this week's episode - to be released soon - we continueto look at issues of practicality involved in taking a position on truth. In the end of the Stoic argument we came upon an interesting historical example that helps us test the question with a practical example. The Stanford Encyclopedia describes the issue - which involves questions of probability or plausibility that is "unimpeded" in this way. Much of the article is relevant but this part is directly on point:
QuoteIn perhaps Cicero’s most technical work, he rarely allows us to lose sight of what purpose the technicality serves. Lucullus had ended his speech in critique of scepticism by addressing Cicero himself, making what looks like a light-hearted jest that Cicero supports a philosophy that keeps things in the dark despite his having brought the most deeply hidden matters to light (2.62). He refers to the uncovering by Cicero of Catiline’s conspiracy, a plot whose nature and significance remain a matter of debate, but whose thwarting Cicero refers to often and takes to represent his having more or less single-handedly saved the republic from catastrophe.
The punning contrast of obscurity and illumination that Lucullus employs thus has a serious point, reminding us that what turns on the sometimes abstruse epistemology is the vital practical question of whether the sceptical viewpoint allows there to be a proper basis for decision and action, especially on the political stage. Roman – and of course not just Roman – politicians, including Cicero himself and those whom he might hope to win over to the sceptical cause, must at times take life-and-death decisions.
One of the most controversial aspects of Cicero’s actions against Catiline was the execution without trial of five of the alleged co-conspirators, an act that ultimately led to Cicero’s exile. Is mere likelihood sufficient to justify the weight of one’s actions in such cases? Should not certainty be the only proper basis? And is a criterion of plausibility even intelligible without a notion of certainty? Whatever we think of Cicero’s answers to these questions, he leaves us in no doubt about why the questions matter. Even at its most abstract, philosophy’s relation to the concrete and practical lies at the heart of his enterprise.
Cassius November 6, 2026 at 9:15 AM
Lucretius Today Podcast Episode 358 is now available: "The Hypocrisy And Darkness of Academic Skepticism"