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§46-48

Critique of the Atomic Swerve and Extant Fragments

Cicero criticizes Epicurus' theory of the atomic swerve (clinamen) as a mere wish lacking any physical cause, pointing out the logical contradiction that it actually reinforces necessity rather than avoiding it. The latter part contains various fragments preserved from the lost portions of the work, covering Chrysippus' struggle, definitions of fate, Homeric verses, astrology versus medicine, and an anecdote of Scipio.

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§46

​Hoc modo hanc causam disceptari oportet,1 non ab atomis errantibus et de via declinantibus petere praesidium. "Declinat", inquit, "atomus". Primum cur? aliam enim quandam vim motus habebant a Democrito inpulsionis,2 quam plagam ille appellat, a te, Epicure, gravitatis et ponderis. Quae ergo nova causa in natura est, quae declinet atomum? aut num sortiuntur inter se, quae declinet, quae non? aut cur minimo declinent intervallo, maiore non? aut cur declinent uno minimo, non declinent duobus aut tribus?

​In this way this cause ought to be debated, not to seek protection from straying atoms that decline from their path. “The atom declines,” he says. First of all, why? For they had some other force of motion from Democritus, that of impulse, which he calls a blow; and from you, Epicurus, that of gravity and weight. What new cause is there then in nature that makes the atom decline? Or do they cast lots among themselves as to which is to decline and which is not? Or why do they decline by a minimum interval, and not by a larger one? Or why do they decline by one minimum, and not by two or three?

§47

​Optare hoc quidem est, non disputare. Nam neque extrinsecus inpulsam atomum loco moveri et declinare dicis, neque in illo inani, per quod feratur atomus, quicquam fuisse causae,3 cur ea non e regione ferretur,4 nec in ipsa atomo mutationis aliquid factum est, quam ob rem naturalem motum sui ponderis non teneret. Ita cum attulisset nullam causam, quae istam declinationem efficeret, tamen aliquid sibi dicere videtur, cum id dicat, quod omnium mentes aspernentur ac respuant.

​This is indeed to wish, not to dispute. For you do not say that the atom, pushed from without, is moved from its place and declines, nor that in that void through which the atom is carried there was any cause why it should not be carried straight, nor has any change occurred in the atom itself to prevent it from keeping the natural motion of its weight. Thus, although he brought forward no cause that would effect that declination, he nevertheless thinks he is saying something, while saying that which all minds reject and spit out.

§48

​Nec vero quisquam magis confirmare mihi videtur non modo fatum, verum etiam necessitatem et vim omnium rerum sustulisseque motus animi voluntarios, quam hic,5 qui aliter obsistere fato fatetur se non potuisse, nisi ad has commenticias declinationes confugisset. Nam, ut essent atomi,6 quas quidem esse mihi probari nullo modo potest, tamen declinationes istae numquam explicarentur. Nam si atomis, ut gravitate ferantur, tributum est necessitate naturae, quod omne pondus nulla re inpediente moveatur et feratur necesse est, illud quoque necesse est, declinare, quibusdam atomis vel, si volunt, omnibus naturaliter Fragmenta "Itaque M. Cicero in libro, quem de fato conscripsit, cum quaestionem istam diceret obscurissimam esse7 et inplicatissimam, Chrysippum quoque philosophum non expedisse se in ea ait his verbis "Chrysippus aestuans laboransque, quonam pacto explicet et fato omnia fieri, et esse aliquid in nobis, intricatur hoc modo."" "volvitque vices definitio fati secundum Tullium, qui ait: "fatum est conexio rerum per aeternitatem se invicem tenens, quae suo ordine et lege variatur, ita tamen, ut ipsa varietas habeat aeternitatem."" "illi quoque versus Homerici huic sententiae suffragantur, quos Cicero in Latinum vertit:" Tales sunt hominum mentes, quali pater ipse Iuppiter auctiferas lustravit lumine terras. "" "Cicero dicit Hippocratem, nobilissimum medicum, scriptum reliquisse quosdam fratres, cum simul aegrotare coepissent et eorum morbus eodem tempore ingravesceret, eodem levaretur, geminos suspicatum. quos Posidonius Stoicus multum astrologiae deditus eadem constitutione astrorum natos eademque conceptos8 solebat asserere. ita, quod medicus pertinere credebat ad simillimam temperiem valetudinis, hoc philosophus astrologus ad vim constitutionemque siderum quae fuerat, quo tempore concepti natique sunt." "et ne vilior sit testis poeta, accipite adsertore Cicerone, in quo honore fuerit hic piscis apud P. Scipionem Africanum illum et Numantinum. Haec sunt in dialogo de fato verba Ciceronis: "Nam cum esset apud se ad Lavernium Scipio unaque Pontius, adlatus est forte Scipioni acupenser, qui admodum raro capitur, sed est piscis, ut ferunt, in primis nobilis. Cum autem Scipio unum et alterum ex iis, qui eum salutatum venerant, invitavisset pluresque etiam invitaturus videretur, in aurem Pontius: "Scipio", inquit, 'vide, quid agas; acupenser iste paucorum hominum est.'""

​Nor indeed does anyone seem to me to have more firmly established not only fate but also necessity and the force of all things, and to have destroyed the voluntary motions of the mind, than he who confesses that he could not otherwise resist fate unless he had fled to these fictitious declinations. For, grant that there are atoms—which indeed can in no way be proved to me to exist—yet those declinations of yours would never be explained. For if it is assigned to atoms, so that they are carried by gravity, by the necessity of nature—since it is necessary that every weight should move and be carried when nothing impedes—it is also necessary for them to decline, for certain atoms or, if they wish, for all of them naturally... Fragmenta “And so M. Cicero, in the book which he composed on fate, when he said that this question was extremely obscure and implicated, says that the philosopher Chrysippus also did not extricate himself from it, in these words: ‘Chrysippus, seething and laboring as to how he may explain both that all things happen by fate and that there is something in us, is entangled in this way.’” “And the definition of fate according to Tullius runs through its turns, who says: ‘Fate is the connection of things holding each other in turn through eternity, which is varied by its own order and law, yet in such a way that this variety itself has eternity.’” “Those Homeric verses also support this view, which Cicero translated into Latin: ‘Such are the minds of men, as the father Jupiter himself has illuminated the fruit-bearing lands with his light.’” ”Cicero says that Hippocrates, the most noble physician, left written that he suspected certain brothers to be twins when they began to fall ill at the same time, and their disease grew worse at the same time and was relieved at the same time. These, Posidonius the Stoic, who was much devoted to astrology, used to assert were born under the same constitution of the stars and conceived under the same. Thus, what the physician believed to belong to a very similar temperament of health, this the philosopher-astrologer attributed to the force and constitution of the stars which had been at the time when they were conceived and born.” “And lest the poet be too cheap a witness, accept on the authority of Cicero in what honor this fish was held by P. Scipio Africanus, the famous conqueror of Numantia. These are the words of Cicero in the dialogue on fate: ‘For when Scipio was at his estate at Lavernum, and Pontius was with him, a sturgeon happened to be brought to Scipio, which is caught quite rarely, but is a fish, as they say, especially noble. But when Scipio had invited one or two of those who had come to greet him, and seemed about to invite even more, Pontius whispered in his ear: “Scipio”, he said, “see what you are doing; that sturgeon is for few men.”’”

Syntax notes8 items
  1. 46Hoc modo hanc causam disceptari oportet

    The impersonal verb oportet takes the accusative and infinitive clause hanc causam disceptari as its subject, with disceptari as a present passive infinitive.

  2. 46aliam enim quandam vim motus habebant a Democrito inpulsionis

    The word order shows a strong hyperbaton, where aliam... quandam vim... inpulsionis forms a single object. inpulsionis is a genitive modifying vim.

  3. 47quicquam fuisse causae

    The pronoun quicquam is modified by the partitive genitive causae, used in a negative context introduced by neque.

  4. 47cur ea non e regione ferretur

    An indirect question clause explaining the content of causae, with the verb ferretur in the imperfect subjunctive. e regione is an idiomatic expression meaning "straight" or "in a straight line".

  5. 48Nec vero quisquam magis confirmare mihi videtur ... quam hic

    A strong negative statement using the comparative magis ... quam hic (no one seems more ... than this man). Note the coordination of the present infinitive confirmare and the perfect infinitive sustulisse as complements of videtur.

  6. 48ut essent atomi

    The conjunction ut with the subjunctive (essent) introduces a concessive clause ("even grant that there are atoms"), which is answered by tamen in the main clause.

  7. 48cum quaestionem istam diceret obscurissimam esse

    The temporal/causal cum clause with the imperfect subjunctive (diceret) embeds an accusative and infinitive construction (quaestionem istam ... esse) as the object of diceret.

  8. 48eadem constitutione astrorum natos eademque conceptos

    An accusative and infinitive clause (natos [esse] eademque conceptos [esse]) with the relative pronoun quos (referring to geminos) as subject, depending on asserere. The ablative eadem constitutione is an ablative of means or circumstance.

Translated by Gemini 3.5 Flash (published 2026-05-22) · Revision history (1, latest 2026-09-21)
  • 2026-09-21 AI review — source 1
urn:cts:latinLit:phi0474.phi054.humanitext-lat1:46-48