24 1. Introduction: The “Magic” of Epicurean Physics

Lucretius’ didactic masterpiece, De rerum natura, serves as a profound bridge between the speculative curiosity of antiquity and the rigors of modern causal inquiry. As Albert Einstein observed in his 1924 foreword to the Diels edition, the poem offers a unique intellectual liberation for those who feel out of step with the intellectual prejudices of their own era.

The work of Lucretius will work its magic on anyone who does not completely wrap himself in the spirit of our time and, in particular, occasionally feels like a spectator of the intellectual attitude of his contemporaries. One sees here how an independent man equipped with lively senses and reasoning, endowed with scientific and speculative curiosity, a man who has not even the faintest notion of the results of today’s science that we are taught in childhood… imagines the world.

Einstein emphasizes that Lucretius’ “firm confidence” in the “causal connectedness of everything that happens in the world” constitutes a profound scientific impression. By reducing the universe to the “regular motion of immutable atoms,” Lucretius aims to achieve the primary objective of Epicureanism: the liberation of humanity from the “slavish fear” induced by religion and superstition, which he viewed as tools of exploitation.

2. Bibliographic Heritage: The 1515 Aldine Edition

The physical history of Lucretius’ text is inextricably linked to the Venetian Renaissance. Broadcaster and naturalist David Attenborough identifies the 1515 Aldine edition as one of his “most precious” books, noting its role as a “meme” in which human experience is embedded and handed down through generations. Published by the legendary Aldus Manutius, this edition represents a pinnacle of early printing technology.

Physical Characteristics of the 1515 Edition:

• Format: Octavo (set as a double-page spread).
• Dimensions: 91 x 160 mm; thickness of 15 mm.
• Typography: Set in the “wonderfully elegant italic script” pioneered by Manutius for his portable “handbook” editions.
• Production: Printed in Venice; the edition consists of 266 pages.

3. Editorial Note: The Diels Tradition

The Latin text presented in this module is based on the authoritative scholarship of Hermann Diels (1848–1922). Diels, a preeminent classical philologist, died in 1922 before the final completion of his edition. The work was published posthumously in 1923 by Johannes Mewaldt. The Diels tradition is defined by a rigorous reconstruction of the Filum Codicum (Lineage of Manuscripts), tracing the text back to a lost 4th-century archetype.

Primary Manuscript Sources (Diels 1923)

4. Parallel Text and Translation: Book IV, 469–721

DE VERO SENSV QVARE COGNOSCATVR (Lines 475a+)

DE FALSO SENSV (Lines 512a+)

DE AVDITIS (Lines 523a+)

CORPOREAM ESSE VOCEM (Lines 525a+)

DE VOCIS IMAGINIBVS (Lines 571a+)

QVA VISVS NON TRANET VOCEM TRANARE (Lines 594a+)

DE SAPORE (Lines 614a+)

QVARE ALIA ALIIS CONTRARIA SINT (Lines 632a+)

DE ODORE (Lines 672a+)

5. Critical Apparatus: Testimonia and Codices [592–623]

Testimonia

The following ancient and medieval citations provide the contextual framework for Lucretius’ reputation as a “sublime” but “difficult” poet:

• Cicero (ad Quintum fr. II 9,3): Notes the poem contains “many flashes of genius, yet much art.”
• Vitruvius (IX Praef. 16): Describes readers “disputing about the nature of things” with Lucretius as if he were present.
• Ovid (Amor. I 15, 23-24): “The verses of sublime Lucretius will perish only when a single day shall give the earth to destruction.”
• Quintilian (X 1,87): Observes that Lucretius is “elegant in his own matter, but… difficult.”

Codices (Variants for Book IV, Lines 592–623)

594      nunc igitur OQG : num igitur L
598      conloquium O : colloquium QG
616      mordemus OQ : mordemur G
621      umbrosas OQ : umbrosas (ex archetypi umbrosas) G
621      umbrosas scripsi : umbrosae It.

6. Student Study Guide: Mechanics of the Senses

Lucretius’ physiological arguments in Book IV are rooted in an atomistic-mechanical worldview. He argues that perception is not a mystical process but a physical interaction between atomic emissions and the sense organs.

Mechanics of Perception:

• Hearing (Voice as Atoms): Lucretius asserts that voice is corporeal (Corpoream… uocem). Sound consists of physical particles that “scrape” the throat and windpipe, proving their material nature through friction and impact.
• Taste: The experience of flavor is determined by the geometric shape of atoms. When we bite food (mordemus), the smooth or rough atoms are distributed through the pores of the palate. Pleasant tastes are caused by smooth, round atoms, while bitterness results from “hooked” or jagged atoms that tear at the sensory membranes.
• Smell: Described as a “vaporous emission” (fluat) that is less persistent than sound or sight because smell-atoms are larger and emanate from the deep interior of objects, often breaking apart during their journey to the nostrils.

Discussion Questions:

1. How does Lucretius use the physical “scraping” of the throat (lines 528-529) to defend his “firm confidence” in the material nature of the soul and its functions?
2. Einstein suggests that Lucretius assigns “particular qualities of matter to particular characteristics of experience.” How does the text in the “DE SAPORE” section illustrate this transition from geometry to sensation?
3. Lucretius argues that the senses are never false, but that “opinion deceives the mind.” Based on lines 513–521, how does this defense of the senses support the Epicurean goal of liberating humanity from the “slavish fear” of the unknown?