From the book
Stobaeus, Volume I
John Stobaeus · Diotimos Editions · 2026
Browse this book’s lexicon →Aether
αἰθήρ
aithērAithēr names a heavenly or upper region and, in some physical accounts, a special celestial substance.
Orientation
At a Glance
- The wordAithēr names a heavenly or upper region and, in some physical accounts, a special celestial substance.
- In StobaeusThe treatise transmitted as Aristotle’s letter to Alexander distinguishes aether from the four elements.
- In this edition“Aether” is retained for the celestial substance; “upper air” expresses the regional sense in the Hermetic comparison.
- A place to beginAether is the uncorrupted celestial element, distinct from the four.
- English renderings
- aether; upper air
Meaning
Aithēr names a heavenly or upper region and, in some physical accounts, a special celestial substance. The context determines whether a location or a constituent of the heavens is in view.
Use in the book
The treatise transmitted as Aristotle’s letter to Alexander distinguishes aether from the four elements. It links the word with the heavens’ perpetual circular running, rejecting a derivation from burning. Elsewhere the word occurs in the description of the eagle’s proper upper region.
Places to read
- I.40.1.5Aether is the uncorrupted celestial element, distinct from the four.
- I.49.68.10The eagle returns to the upper air, the region suited to it.
Translation in this edition
“Aether” is retained for the celestial substance; “upper air” expresses the regional sense in the Hermetic comparison. The two renderings make the function of the word visible.
Images and comparisons
In the Isis-Horus dialogue, birds returning to their own heights illustrate the assignment of souls to appropriate regions. The eagle’s upper air participates in that comparison; the passage is not introducing a new fifth-element theory.
Source note
Wachsmuth, volume I, printed pp. 256, 460. The alternatives αἴθεσθαι, “to burn,” and ἀεὶ θεῖν, “always to run,” are ancient explanatory wordplay. They are not presented here as established historical etymologies.
From the book
Empedocles’ Complete Fragments, Volume I
Empedocles of Acragas · Diotimos Editions · 2026
Browse this book’s lexicon →Aither
αἰθήρ (aithēr); αἰθέρι παμφανόωντι (aitheri pamphanoōnti); αἰθέρα δῖον (aithera dion); αἰθέριον (aitherion)
Aithēr is retained as “aither” in much of this translation.
Orientation
At a Glance
- The wordAithēr is retained as “aither” in much of this translation.
- In EmpedoclesAither is one of the named ingredients from which the forms and colours of mortals arise in B 712.
- In this editionThe edition’s retention of “aither” is a warning against overtranslation, not a precise scientific definition.
- A place to readShining aither participates in the near-equal mixture which produces blood and flesh.
Meaning
Aithēr is retained as “aither” in much of this translation. Its associations with radiance, divinity, and the upper regions matter, but its Empedoclean range is wider than the modern expression “upper atmosphere.” The adjective aitherion in B 1152 becomes “of the upper air.” The exact forms also occur in passages about mixture, breathing, and what lies below earth. Transliteration helps prevent a later philosophical meaning from being silently substituted.
Use in the book
Aither is one of the named ingredients from which the forms and colours of mortals arise in B 712. B 98 mixes all-shining aither with Earth, Hephaestus, and rain to produce blood and flesh. B 109 locates divine aither both in the recogniser and in what is recognised. These are substantial roles in embodied life, not merely ornamental references to a remote sky.
Its spatial appearances are equally varied. B 38 gives it a circling, enclosing function in this edition's translation, which joins “Titan” to “aither.” The Greek coordinates the two with “and,” so reading Titan and aither separately must remain a live alternative. B 54 sends it beneath earth with long roots. B 1002 uses it for the medium passing through bodily channels and participating in the water-catcher analogy. The latter alternates aither, air, and breath in a way that prevents a rigid one-word, one-altitude scheme. B 37's statement that aither increases aither instead stresses continuity of kind amid the changes.
The exile narrative also makes aither active: its force drives the wanderer to sea and its eddies receive him again from the sun. B 135 extends what is lawful through wide-ruling aither and light, using the cosmic reach of the term to express the scope of a norm. Neither passage defines aither as the substance of the travelling daimon.
The introduction reports interpretations in which Zeus corresponds to air or aither, as well as other mappings. These remain interpretations. One must especially resist reading aither here as a securely distinct fifth element. The four-root account is Empedoclean; the later terminology and classifications associated with Plato and Aristotle are not its unspoken key.
Places to read
- B 98.1–5Shining aither participates in the near-equal mixture which produces blood and flesh.
- B 54Aither extends down beneath earth with long roots.
- B 100.1–252Aither enters and leaves bodily passages and plays the corresponding role in the clepsydra comparison.
- B 115.9–12Aither is an agent and region of the wanderer's expulsion.
- B 135Wide-ruling aither marks the uninterrupted cosmic extension of what is lawful.
- B 38The English joins “Titan aither,” while the Greek has the coordinating “and”; a separate Titan and aither reading must remain visible.
Translation in this edition
The edition’s retention of “aither” is a warning against overtranslation, not a precise scientific definition. B 38 prints Τιτὰν ἠδ' αἰθὴρ, coordinating “Titan and aither,” whereas the English gives “the Titan aither.” The translation therefore makes a syntactic decision which should not be treated as a secure identity. Reading Titan separately does not by itself establish a fifth root.
Source note
A later theory may use the same Greek word while giving it a different technical role. Lexical continuity alone does not establish doctrinal continuity. Titan is retained here as a lookup label because the supplied translation attaches it to aither. The coordinated Greek permits a separate referent; identifying that referent more precisely requires interpretation beyond the English rendering.
From the book
Empedocles’ The Testimonia, Volume II
Empedocles of Acragas · Diotimos Editions · 2026
Browse this book’s lexicon →Aither
αἰθέρα (aithera); αἰθέρος (aitheros); aether
The Greek forms and Latin aether designate the aither of these reports.
Orientation
At a Glance
- The wordThe Greek forms and Latin aether designate the aither of these reports.
- In this workPs.-Plutarch’s introductory enumeration in A30 gives fire, water, aither and earth, where other enumerations use air.
- In this editionPhilo survives here through Latin translated from Armenian, itself representing lost Greek.
- A place to readUses aither in the fourfold enumeration but air in the ensuing cosmological narrative.
Meaning
The Greek forms and Latin aether designate the aither of these reports. The transliteration preserves a distinction obscured if every occurrence is rendered “air,” but does not assign the word a single technical definition across authors. It is not the modern luminiferous ether.
Use in the book
Ps.-Plutarch’s introductory enumeration in A30 gives fire, water, aither and earth, where other enumerations use air. The subsequent account nevertheless speaks of air as well. At A332 both Aëtius and the Homeric Allegories gloss Zeus through heat and aither, connecting aither with the fiery divine name rather than simply assigning it to the root elsewhere called air.
Aëtius’ cosmogonic sequence at A49 separates aither first, fire second, then earth; water comes from compressed earth and air is exhaled from water. Heaven is made from aither in that report. Philo’s transmitted account also begins with aether’s separation but has air and fire ascend together and describes aether revolving around the central earth. The common priority of separation is useful evidence; it does not erase differences in what the ensuing materials do.
A reader reconstructing a single cosmology should therefore distinguish at least three questions: what a witness calls the fourth root, what a divine-name gloss equates with Zeus, and what material is separated first in a cosmogony. The same English label cannot answer all three.
Places to read
- A 30 (testimony)Ps.-Plutarch, Stromateis, in Eusebius P.E. I 8,10. Uses aither in the fourfold enumeration but air in the ensuing cosmological narrative.
- A 33 (testimony)2Aëtius I 3,20; Homeric Allegories, in Stobaeus. Includes aither in the gloss of Zeus.
- A 49 (testimony)Aëtius II 6,3; Philo, De providentia II 60. Both accounts begin with separation of aither; their subsequent spatial accounts are not identical.
Translation in this edition
Philo survives here through Latin translated from Armenian, itself representing lost Greek. Its Latin vocabulary cannot independently establish Empedocles’ exact Greek usage; the parenthetic Greek in this edition is explanatory.
Source note
The spellings aither and aether are transliteration choices in English and Latin transmission. Their visual difference does not by itself prove two different substances.