Diogenes Laertius - Lives of Eminent Philosophers (epicurus.net)

The terms he used for things were the ordinary terms, and Aristophanes the grammarian credits him with a very characteristic style. He was so lucid a writer that in the work On Rhetoric he makes clearness the sole requisite. And in his correspondence, he replaces the usual greeting “I wish you joy” by wishes for welfare and right living, “May you do well,” and “Live well.”

 

They affirm that there are two states of feeling, pleasure and pain, which arise in every animate being, and that the one is favorable and the other hostile to that being, and by their means choice and avoidance are determined; and that there are two kinds of inquiry, the one concerned with things, the other with nothing but words. 

 

Epicurean ethics

But as to the conduct of life, what we ought to avoid and what to choose, he writes as follows. Before quoting his words, however, let me go into the views of Epicurus himself and his school concerning the wise man.

There are three motives to injurious acts among men—hatred, envy, and contempt; and these the wise man overcomes by reason. Moreover, he who has once become wise never more assumes the opposite habit, not even in semblance, if he can help it. He will be more susceptible of emotion than other men: that will be no hindrance to his wisdom. However, not every bodily constitution nor every nationality would permit a man to become wise.

Even on the rack the wise man is happy. He alone will feel gratitude towards friends, present and absent alike, and show it by word and deed. When on the rack, however, he will give vent to cries and groans. As regards women he will submit to the restrictions imposed by the law, as Diogenes says in his epitome of Epicurus' ethical doctrines. Nor will he punish his servants; rather he will pity them and make allowance on occasion for those who are of good character.

Epicureans do not suffer the wise man to fall in love; nor will he trouble himself about funeral rites; according to them love does not come by divine inspiration: so, Diogenes in his twelfth book. The wise man will not make fine speeches. No one was ever the better for sexual indulgence, and it is well if he be not the worse.

Nor, again, will the wise man marry and rear a family—so Epicurus says in the Problems and in the On Nature. Occasionally he may marry owing to special circumstances in his life. Some too will turn aside from their purpose. Nor will he drivel, when drunken: so, Epicurus says in the Symposium. Nor will he take part in politics, as is stated in the first book On Life; nor will he make himself a tyrant; nor will he turn Cynic (so the second book On Life tells us); nor will he be a mendicant.

But even when he has lost his sight, he will not withdraw himself from life: this is stated in the same book. The wise man will also feel grief, according to Diogenes in the fifth book of his Epilecta. And will take a suit into court. He will leave written words behind him but will not compose panegyric. He will have regard to his property and to the future.

He will be fond of the country. He will be armed against fortune and will never give up a friend. He will pay just so much regard to his reputation as not to be looked down upon. He will take more delight than other men in public festivals.

The wise man will set up votive images. Whether he is well off or not will be matter of indifference to him. Only the wise man will be able to converse correctly about music and poetry, without however actually writing poems himself. One wise man does not move more wisely than another. And he will make money, but only by his wisdom, if he should be in poverty, and he will pay court to a king, if need be. He will be grateful to anyone when he is corrected.

He will found a school, but not in such a manner as to draw the crowd after him; and will give readings in public, but only by request. He will be a dogmatist but not a mere skeptic; and he will be like himself even when asleep. And he will on occasion die for a friend.

The school holds that sins are not all equal; that health is in some cases a good, in others a thing indifferent; that courage is not a natural gift but comes from calculation of expediency; and that friendship is prompted by our needs. One of the friends, however, must make the first advances (just as we have to cast seed into the earth), but it is maintained by a partnership in the enjoyment of life's pleasures.

Two sorts of happiness can be conceived, the one the highest possible, such as the gods enjoy, which cannot be augmented, the other admitting addition and subtraction of pleasures.

 

Letter to Menoeceus

Elsewhere he rejects the whole of divination, as in the short epitome, and says, “No means of predicting the future really exists, and if it did, we must regard what happens according to it as nothing to us.”

Such are his views on life and conduct; and he has discoursed upon them at greater length elsewhere. He differs from the Cyrenaics with regard to pleasure. They do not include under the term the pleasure, which is a state of rest, but only that which consists in motion. Epicurus admits both; also pleasure of mind as well as of body, as he states in his work On Choice and Avoidance and in that On the Ethical End, and in the first book of his work On Human Life and in the epistle to his philosopher friends in Mytilene.

So also, Diogenes in the seventeenth book of his Epilecta, and Metrodorus in his Timocrates, whose actual words are: “Thus Pleasure being conceived both as that species which consists in motion and that which is a state of rest.” The words of Epicurus in his work On Choice are: “Peace of mind and freedom from pain are pleasures which imply a state of rest; joy and delight are seen to consist in motion and activity.”

He further disagrees with the Cyrenaics in that they hold that pains of body are worse than mental pains; at all events evil-doers are made to suffer bodily punishment; whereas Epicurus holds the pains of the mind to be the worse; at any rate the flesh endures the storms of the present alone, the mind those of the past and future as well as the present. In this way also he holds mental pleasures to be greater than those of the body.

And as proof that pleasure is the end he adduces the fact that living things, so soon as they are born, are well content with pleasure and are at enmity with pain, by the prompting of nature and apart from reason. Left to our own feelings, then, we shun pain; as when even Heracles, devoured by the poisoned robe, cries aloud,

“And bites and yells, and rock to rock resounds,
Headlands of Locris and Euboean cliffs.”

And we choose the virtues too on account of pleasure and not for their own sake, as we take medicine for the sake of health. So too in the twentieth book of his Epilecta says Diogenes, who also calls education recreation. Epicurus describes virtue as the sine qua non of pleasure, i.e. the one thing without which pleasure cannot be, everything else, food, for instance, being separable, i.e. not indispensable to pleasure.

Come, then, let me set the seal, so to say, on my entire work as well as on this philosopher's life by citing his Principal Doctrines, so to bring the whole work to a close and making the end of it to coincide with the beginning of happiness:

The 12 Elementary Principles of Epicurus

1)  Matter is uncreatable.

2)  Matter is indestructible. 

3)  The universe consists of solid bodies and void.

4)  Solid bodies are either compounds or simple, 

5)  The multitude of atoms is infinite.

6)  The void is infinite in extent.

7)  The atoms are always in motion.

8)  The speed of atomic motion is uniform.

9)  Motion is linear in space, vibratory in compounds.

10) Atoms are capable of swerving slightly at any point in space or time.

11) Atoms are characterized by three qualities , weight, shape and size.

12) The number of the different shapes is not infinite, merely innumerable.

 

Epicurus was not an empiricist, he used these principles as the major premises from which the rest of knowlede is derived by deductive reasoning. 

 

Sure, let’s break down each of these concepts and see if any have been disproved:

  1. Matter is uncreatable: This idea aligns with the law of conservation of mass, which states that matter cannot be created or destroyed in an isolated system. This principle is still accepted in modern physics1.

  2. Matter is indestructible: Similar to the above, this principle is also supported by the law of conservation of mass. However, matter can change forms (e.g., from solid to gas) but the total mass remains constant2.

  3. The universe consists of solid bodies and void: This concept comes from ancient atomism, which posits that the universe is made up of atoms (solid bodies) and empty space (void). Modern physics supports the idea that much of the universe is empty space, but it also includes fields and forces3.

  4. Solid bodies are either compounds or simple: In modern chemistry, this is true. Elements are simple substances, while compounds are made of two or more elements chemically bonded together4.

  5. The multitude of atoms is infinite: While the number of atoms in the universe is extremely large, it is not infinite. Current estimates suggest there are between (10^{78}) and (10^{82}) atoms in the observable universe5.

  6. The void is infinite in extent: The concept of an infinite void is more philosophical. In cosmology, the universe is considered to be expanding, but whether it is infinite is still a matter of scientific debate6.

  7. The atoms are always in motion: This is true according to kinetic theory, which states that atoms and molecules are in constant motion7.

  8. The speed of atomic motion is uniform: This is not entirely accurate. The speed of atomic motion varies depending on the temperature and the state of the matter (solid, liquid, gas)7.

  9. Motion is linear in space, vibratory in compounds: Atoms in gases move linearly, while in solids and liquids, they vibrate around fixed positions7.

  10. Atoms are capable of swerving slightly at any point in space or time: This idea, known as the “swerve” or “clinamen,” was proposed by Epicurus to explain free will. It is not supported by modern physics, which relies on deterministic laws8.

  11. Atoms are characterized by three qualities: weight, shape, and size: Modern atomic theory describes atoms by their mass, charge, and spatial distribution of electrons, which can be related to weight, shape, and size7.

  12. The number of different shapes is not infinite, merely innumerable: There are a finite number of ways atoms can combine to form molecules, but the number is extremely large7.

I hope this helps clarify these concepts! If you have any more questions or need further details, feel free to ask.

 

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