Lantern

Use in the book

The traveller does not simply light a flame. He equips it with a protective structure, and that structure discriminates between what must be excluded and what must emerge. Blowing wind is scattered; light leaps out and shines across the threshold. The relation between protection and passage gives the image its explanatory force.

The eye is then described in parallel. Primeval fire is enclosed within membranes and fine tissues in the pupil. Surrounding water is kept back, while finer fire passes outward through channels. The comparison therefore concerns an enclosed luminous source with a selectively permeable covering. It should not be rewritten as a camera analogy, in which the principal image would be light entering through a lens.

The practical setting contributes to the philosophy. A person arranging a familiar object can grasp how a covering both safeguards a source and permits its activity. The crafted artifact provides a model for the fit of parts in an organism, just as the clepsydra makes alternating bodily flows visible. Yet neither model proves that organisms are manufactured by a human artisan. The craft image clarifies arrangement and function within the poem’s own account of divine fitting and physical mixture.

Places to read

1. B 84.1–62The traveller’s lamp is screened against wind while emitting light.
2. B 84.7–11The eye is described through the same pattern of enclosure and selective passage.
3. B 1002The clepsydra offers another extended artifact-based bodily analogy.

Translation in this edition

The edition varies lamp, flame, light, and fire according to the Greek. Preserving those distinctions helps prevent the comparison from being treated as a single modern technical statement about optical radiation.

Use in the book

Theophrastus compares the fine fire within sight, passing through its surrounding constituents, with light in lanterns. Aristotle restates an outgoing-light interpretation: if vision occurs by light leaving as it does from a lantern, why cannot sight see in darkness? His question targets the explanatory adequacy of that interpretation.

The comparison needs to be read beside the account of external light and the balance of fire and water. Those qualifications prevent an automatic inference from “eye like lantern” to “the eye illuminates any dark object by itself.” Yet they do not establish that Empedocles answered Aristotle's precise objection in a preserved exchange. The sources provide reports and criticisms from which a qualified reconstruction can be made. The full poetic lantern description belongs to the companion fragments; this volume gives prose use and argumentative reception.

Places to read

1. A 86 §§ 7–8 (testimony)2Theophrastus, On the Senses 7. Compares the passage of fine internal fire with lantern light.
2. A 91 (polemical)Aristotle, On Sense and Sense-Objects. Uses the outgoing lantern-light account to pose the darkness objection.

Translation in this edition

The edition links the analogy to B84, but that cross-volume reference is not another printed quotation at these locations. Its commentary should not convert Aristotle's challenge into a historically documented reply-and-counterreply.