Epicurus holds that every perception and every impression is true, but that some beliefs are true and others false.1932
21.2 · A difficult explanatory addition
I.50.21.2 · Wachsmuth pp. 475
And perception is made false in one way, in relation to objects of thought, whereas impression [is understood] in two ways; for there is an impression both of perceptible things and of objects of thought.1933
22 · The fit between object and passage
I.50.22 · Wachsmuth pp. 475
Parmenides, Empedocles, Anaxagoras, Democritus, Epicurus, and Heraclides hold that the particular senses perceive their appropriate objects through the commensurability of the passages, each perceptible object fitting its corresponding sense.1934
23 · The faculties of the sense organs
I.50.23 · Wachsmuth pp. 475
The Peripatetics hold that this occurs through the faculties of the sense organs.1935
24.1 · Nature and convention
I.50.24.1 · Wachsmuth pp. 476
Others hold that perceptible things exist by nature; Leucippus, Democritus, and Diogenes that they exist by convention, that is, through our own opinion and affection.1936
24.2 · Atoms, void, and compounds
I.50.24.2 · Wachsmuth pp. 476
Nothing is true or apprehensible except the primary elements, atoms and void. For these alone exist by nature, while the things composed of them, differing from one another in position, arrangement, and shape, are incidental.1937
25 · Appetite and deficiency
I.50.25 · Wachsmuth pp. 476
⟨Aëtius.⟩
Parmenides and Empedocles hold that appetite arises from a lack of nourishment.1938
26 · Mixture and predominance
I.50.26 · Wachsmuth pp. 476
⟨Aëtius.⟩
Those who posit atoms, those who posit things with like parts, and those who posit partless things and minima hold that all perceptible things are mixed in all things and none is unmixed. Each is called this or that according to what predominates and according to its abundance of radiance.1939
27 · Senses and elements
I.50.27 · Wachsmuth pp. 476
Pythagoras and Plato hold that each perceptible thing is pure, proceeding from its respective element. The ethereal is naturally suited to sight, the pneumatic to hearing, the fiery to smell, the moist to taste, and the earthy to touch.1940
28 · Pleasures and pains as perceptible
I.50.28 · Wachsmuth pp. 476
Epicurus counts ⟨the⟩ pleasures, and pains as well, among perceptible things.1941
29 · Pleasures and pains as objects of thought
I.50.29 · Wachsmuth pp. 476
The Peripatetics count them among objects of thought; for the same things do not appear pleasant and painful to everyone, as they do white and black.1942
30 · Pleasure in general and in particular
I.50.30 · Wachsmuth pp. 477
Chrysippus holds that the pleasant in general is an object of thought, but the particular pleasant thing that impinges upon us is perceptible.1943
31 · Pleasure through likeness and replenishment
I.50.31 · Wachsmuth pp. 477
⟨Aëtius.⟩
Empedocles holds that pleasures arise with like things [of like things] and, where something is deficient, in relation to replenishment, so that what is deficient has an appetite for what is like it. Pains arise with opposites; for things differing in composition and in the blending of their elements are alien to one another.1944
32 · Perception accompanied by pain
I.50.32 · Wachsmuth pp. 477
Anaxagoras holds that every perception is accompanied by pain.1945
33 · Pleasure or pain added afterward
I.50.33 · Wachsmuth pp. 477
Others hold that either pleasure or pain supervenes and is not inherent from the outset.1946
34 · Recognizing the wise person
I.50.34 · Wachsmuth pp. 477
The Stoics hold that the wise person can be apprehended by perception, inferentially from appearance; the Academics that the wise person is known by reason; Epicurus that the wise person is known only to a wise person.1947
“How strange, gentlemen,” he said, “this thing that people call pleasant seems to be! How remarkably it is related to what is thought to be its opposite, the painful: the two refuse to visit a person together, yet if someone pursues and obtains one, he is almost always compelled to obtain the other as well, as though they were two creatures attached to a single head.”1949
36.2 · An imagined fable of Aesop
I.50.36.2 · Wachsmuth pp. 478
“And I think,” he said, “that if Aesop had thought of them, he would have composed a fable: the god wanted to reconcile them in their quarrel, but, unable to do so, fastened their heads together; and for this reason, whenever one visits someone, the other follows afterward.”1950
36.3 · Relief after the fetter
I.50.36.3 · Wachsmuth pp. 478
“That seems to be what has happened to me too: because the fetter caused pain in my leg, pleasure now seems to have arrived in its wake.”1951
37.1 · Appearance and perception
I.50.37.1 · Wachsmuth pp. 478
From Plato’s Theaetetus.
“Appearance and perception, then, are the same in the case of hot things and all such things; for as each person perceives them, so they seem likely to be for that person. . . . .”1952