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seems firmly inline with the way different options are presented for other physical phenomena.
A primary example would be the celestial phenomena, in the letter to Pythocles, about which we are pretty clearly just guesstimating and taking the multivalent approach, correct? Or do you have others in mind?
Oh one one thing I wish I had said differently in the podcast: When Lucretius talks in Book Four about whether Nature has created or lined up these images to be provided for us to think about things, I think at least a significant part of that has to be interpreted as suggesting something that Lucretius was setting up as absurd and not to be believed, just like the idea of nature lining up souls to inhabit the bodies of new-born things. It seems to me he intended us to answer that as "no" and that the real issues is more along the lines of what we tune our minds to receive via past experiences and choices, although with perhaps a dash of "nature" being added in somewhere in addition to the "nurture."
Here is that question which should be answered "no, or course not, the idols don't keep watch on our wills:"
[779] First of all it is asked why, whatever the whim may come to each of us to think of, straightway his mind thinks of that very thing. Do the idols keep watch on our will, and does the image rise up before us, as soon as we desire, whether it pleases us to think of sea or land or sky either? Gatherings of men, a procession, banquets, battles, does nature create all things at a word, and make them ready for us? And that when in the same place and spot the mind of others is thinking of things all far different.
And Here is the basis for suggesting that the images of things can be real and yet not reflect actually-existing things:
[732] And so we see Centaurs and the limbs of Scyllas, and the dog-faces of Cerberus and idols of those who have met death, and whose bones are held in the embrace of earth; since idols of every kind are borne everywhere, some which are created of their own accord even in the air, some which depart in each case from diverse things, and those again which are made and put together from the shapes of these. For in truth the image of the Centaur comes not from a living thing, since there never was the nature of such a living creature, but when by chance the images of man and horse have met, they cling together readily at once, as we have said ere now, because of their subtle nature and fine fabric. All other things of this kind are fashioned in the same way. And when they move nimbly with exceeding lightness, as I have shown ere now, any one such subtle image stirs their mind; for the mind is fine and of itself wondrous nimble.
And that's the basis for my suggestion above that this is probably the prime contender for reconciling how the gods can be "real" (the images are real) and yet the truth about the gods (what we more accurately gather about their true natures) does not come entirely or even primarily from what the images convey. They are neither totally idealistic nor totally "real" in the way that we are observing them, and that leads back to incorporating such issues as isonomia and "nature never makes only one thing of a kind."
Here's a related question: Given the way that the images discussion is presented ("It is not impossible that..." "Nothing contradicts...") is it possible that the "images" were being presented as a hypothetical "one among the possibilities" theory, rather than as a core part of the doctrine? That would be directly related then to the issue of the "gods" as well, since observing them through "images" seems to be a part of the way Epicurus was suggested that they are known.
Further the teminology of the discussion of Centaurs (which do not exist, yet can apparently be observed randomly when images mix) might be another example of how images of the gods are formed and received "clearly" and yet not originating from a "real" object (at least not "real" in the form that the images appear to make them).
I am pretty sure I have seen such a suggestion made in one of more of the commentaries.
And I think that's probably the prime contender for reconciling how the gods can be "real" (the images are real) and yet the truth about the gods is different from what the images convey. They are neither totally idealistic nor totally "real" in the way that we are observing them, and that leads back to incorporating such issues as isonomia and "nature never makes only one thing of a kind."
At the very very least, I do think that the "not impossible" phrasing indicates something important to be considered in the way Epicurus is discussing the whole issue of images.
Agreed. Analogies and comparisons only go so far, and some are more helpful than others. In the end, words are only representations of the reality and we are constantly working to revise them make them more accurate as our information expands. We shouldn't resist improvements in explanations any more than we should get complacent that our current wordings are "final."
Added thought:. I wonder if one of the analogies here too is a parallel between waht we presume must be nerve impulses traveling within our body and at least some of these images.
I am not even sure what we think of these today:. Are they electrical impulses? Chemicals?
Another question might be whether these impluses are "analog" vs digital" -. I presume analog is more likely? "Analog" would probably have more similarities to "images" retaining there "shape."
Episode 118 of the Lucretius Today Podcast is now available. This week we talk about the very difficult subject of "images" and how they impact the mind. Please let us know any comments or questions you have in the thread below, and please be sure to subscribe to the podcast on your telephone or other podcast aggregator.
Welcome to Episode One Hundred Nineteen of Lucretius Today.
This is a podcast dedicated to the poet Lucretius, who wrote "On The Nature of Things," the only complete presentation of Epicurean philosophy left to us from the ancient world.
I am your host Cassius, and together with our panelists from the EpicureanFriends.com forum, we'll walk you through the ancient Epicurean texts, and we'll discuss how Epicurean philosophy can apply to you today. We encourage you to study Epicurus for yourself, and we suggest the best place to start is the book "Epicurus and His Philosophy" by Canadian professor Norman DeWitt.
If you find the Epicurean worldview attractive, we invite you to join us in the study of Epicurus at EpicureanFriends.com, where you will find a discussion thread for each of our podcast episodes and many other topics.
Today we continue our review of Epicurus' letter to Herodotus, and we move further into fundamental physics.
Now let's join Martin reading today's text:
Bailey
Moreover, hearing, too, results when a current is carried off from the object speaking or sounding or making a noise, or causing in any other way a sensation of hearing. Now this current is split up into particles, each like the whole, which at the same time preserve a correspondence of qualities with one another and a unity of character which stretches right back to the object which emitted the sound: this unity it is which in most cases produces comprehension in the recipient, or, if not, merely makes manifest the presence of the external object.
[53] For without the transference from the object of some correspondence of qualities, comprehension of this nature could not result. We must not then suppose that the actual air is molded into shape by the voice which is emitted or by other similar sounds — for it will be very far from being so acted upon by it — but that the blow which takes place inside us, when we emit our voice, causes at once a squeezing out of certain particles, which produce a stream of breath, of such a character as to afford us the sensation of hearing.
Furthermore, we must suppose that smell too, just like hearing, could never bring about any sensation, unless there were certain particles carried off from the object of suitable size to stir this sense-organ, some of them in a manner disorderly and alien to it, others in a regular manner and akin in nature.
[54] Moreover, we must suppose that the atoms do not possess any of the qualities belonging to perceptible things, except shape, weight, and size, and all that necessarily goes with shape. For every quality changes; but the atoms do not change at all, since there must needs be something which remains solid and indissoluble at the dissolution of compounds, which can cause changes; not changes into the nonexistent or from the non-existent, but changes effected by the shifting of position of some particles, and by the addition or departure of others. For this reason it is essential that the bodies which shift their position should be imperishable and should not possess the nature of what changes, but parts and configuration of their own. For thus much must needs remain constant.
[55] For even in things perceptible to us which change their shape by the withdrawal of matter it is seen that shape remains to them, whereas the qualities do not remain in the changing object, in the way in which shape is left behind, but are lost from the entire body. Now these particles which are left behind are sufficient to cause the differences in compound bodies, since it is essential that some things should be left behind and not be destroyed into the non-existent.
Moreover, we must not either suppose that every size exists among the atoms, in order that the evidence of phenomena may not contradict us, but we must suppose that there are some variations of size. For if this be the case, we can give a better account of what occurs in our feelings and sensations.
[56] But the existence of atoms of every size is not required to explain the differences of qualities in things, and at the same time some atoms would be bound to come within our ken and be visible; but this is never seen to be the case, nor is it possible to imagine how an atom could become visible.
Besides this we must not suppose that in a limited body there can be infinite parts or parts of every degree of smallness. Therefore, we must not only do away with division into smaller and smaller parts to infinity, in order that we may not make all things weak, and so in the composition of aggregate bodies be compelled to crush and squander the things that exist into the non-existent, but we must not either suppose that in limited bodies there is a possibility of continuing to infinity in passing even to smaller and smaller parts.
HICKS
"Again, hearing takes place when a current passes from the object, whether person or thing, which emits voice or sound or noise, or produces the sensation of hearing in any way whatever. This current is broken up into homogeneous particles, which at the same time preserve a certain mutual connexion and a distinctive unity extending to the object which emitted them, and thus, for the most part, cause the perception in that case or, if not, merely indicate the presence of the external object.
[53] For without the transmission from the object of a certain interconnexion of the parts no such sensation could arise. Therefore we must not suppose that the air itself is moulded into shape by the voice emitted or something similar; for it is very far from being the case that the air is acted upon by it in this way. The blow which is struck in us when we utter a sound causes such a displacement of the particles as serves to produce a current resembling breath, and this displacement gives rise to the sensation of hearing. "Again, we must believe that smelling, like hearing, would produce no sensation, were there not particles conveyed from the object which are of the proper sort for exciting the organ of smelling, some of one sort, some of another, some exciting it confusedly and strangely, others quietly and agreeably.
[54] "Moreover, we must hold that the atoms in fact possess none of the qualities belonging to things which come under our observation, except shape, weight, and size, and the properties necessarily conjoined with shape. For every quality changes, but the atoms do not change, since, when the composite bodies are dissolved, there must needs be a permanent something, solid and indissoluble, left behind, which makes change possible: not changes into or from the non-existent, but often through differences of arrangement, and sometimes through additions and subtractions of the atoms. Hence these somethings capable of being diversely arranged must be indestructible, exempt from change, but possessed each of its own distinctive mass and configuration. This must remain.
[55] "For in the case of changes of configuration within our experience the figure is supposed to be inherent when other qualities are stripped off, but the qualities are not supposed, like the shape which is left behind, to inhere in the subject of change, but to vanish altogether from the body. Thus, then, what is left behind is sufficient to account for the differences in composite bodies, since something at least must necessarily be left remaining and be immune from annihilation. "Again, you should not suppose that the atoms have any and every size, lest you be contradicted by facts; but differences of size must be admitted; for this addition renders the facts of feeling and sensation easier of explanation.
[56] But to attribute any and every magnitude to the atoms does not help to explain the differences of quality in things; moreover, in that case atoms large enough to be seen ought to have reached us, which is never observed to occur; nor can we conceive how its occurrence should be possible, i. e. that an atom should become visible. "Besides, you must not suppose that there are parts unlimited in number, be they ever so small, in any finite body. Hence not only must we reject as impossible subdivision ad infinitum into smaller and smaller parts, lest we make all things too weak and, in our conceptions of the aggregates, be driven to pulverize the things that exist, i. e. the atoms, and annihilate them; but in dealing with finite things we must also reject as impossible the progression ad infinitum by less and less increments.
YONGE
"Again, hearing takes place when a current passes from the object, whether person or thing, which emits voice or sound or noise, or produces the sensation of hearing in any way whatever. This current is broken up into homogeneous particles, which at the same time preserve a certain mutual connexion and a distinctive unity extending to the object which emitted them, and thus, for the most part, cause the perception in that case or, if not, merely indicate the presence of the external object.
[53] For without the transmission from the object of a certain interconnexion of the parts no such sensation could arise. Therefore we must not suppose that the air itself is moulded into shape by the voice emitted or something similar; for it is very far from being the case that the air is acted upon by it in this way. The blow which is struck in us when we utter a sound causes such a displacement of the particles as serves to produce a current resembling breath, and this displacement gives rise to the sensation of hearing. "Again, we must believe that smelling, like hearing, would produce no sensation, were there not particles conveyed from the object which are of the proper sort for exciting the organ of smelling, some of one sort, some of another, some exciting it confusedly and strangely, others quietly and agreeably.
[54] "Moreover, we must hold that the atoms in fact possess none of the qualities belonging to things which come under our observation, except shape, weight, and size, and the properties necessarily conjoined with shape. For every quality changes, but the atoms do not change, since, when the composite bodies are dissolved, there must needs be a permanent something, solid and indissoluble, left behind, which makes change possible: not changes into or from the non-existent, but often through differences of arrangement, and sometimes through additions and subtractions of the atoms. Hence these somethings capable of being diversely arranged must be indestructible, exempt from change, but possessed each of its own distinctive mass and configuration. This must remain.
[55] "For in the case of changes of configuration within our experience the figure is supposed to be inherent when other qualities are stripped off, but the qualities are not supposed, like the shape which is left behind, to inhere in the subject of change, but to vanish altogether from the body. Thus, then, what is left behind is sufficient to account for the differences in composite bodies, since something at least must necessarily be left remaining and be immune from annihilation. "Again, you should not suppose that the atoms have any and every size, lest you be contradicted by facts; but differences of size must be admitted; for this addition renders the facts of feeling and sensation easier of explanation.
[56] But to attribute any and every magnitude to the atoms does not help to explain the differences of quality in things; moreover, in that case atoms large enough to be seen ought to have reached us, which is never observed to occur; nor can we conceive how its occurrence should be possible, i. e. that an atom should become visible. "Besides, you must not suppose that there are parts unlimited in number, be they ever so small, in any finite body. Hence not only must we reject as impossible subdivision ad infinitum into smaller and smaller parts, lest we make all things too weak and, in our conceptions of the aggregates, be driven to pulverize the things that exist, i. e. the atoms, and annihilate them; but in dealing with finite things we must also reject as impossible the progression ad infinitum by less and less increments.
One of the passages that caught my attention in recent A Few Days In Athens Discussions was this one from Chapter Eight:
Prejudices, when once seen as prejudices, are easily yielded. The difficulty is to come at the knowledge of them. A thousand lectures had I read to myself, ere I could calmly say, upon all occasions, it does not follow that the thing is, because I think it is;....
First of all, I am not sure that I can identify a specific passage in the texts which support this point, but I do think it is a fair expansion of the discussions of how to separate the true from the false.
Secondly, this particular passage may be focused more on reasons to be slow to anger because of error, given that we all commit errors. But if carried too far this would lead to radical skepticism, but of course I don't think that she means that or that Epicurus would endorse that conclusion. The much more useful analysis would be to identify under what conditions we should hold our conclusions as firm, what conditions less firm, and how we tell the difference.
But I wonder if there is not something else here too that would be worth thinking about: I wonder what "kind of lectures" that Frances Wright had in mind, or found a basis for in Epicurus, which would lead to this kind of conclusion?
Another way of asking the question here would be: What is the point here that would be significant for us to remember to improve our own thought processes? What "study and discipline" are necessary to produce "forbearance" and "candor"?
Here is the full context of the discussion:
I beg your pardon for the digression,” said Theon: “but I think you have more forbearance and more candor than any man I ever heard of.”
Epicurus: “If it be so, these useful qualities have not been attained without much study and discipline; for Zeno is mistaken in thinking all my virtues the children of temperament. I very early perceived candor to be the quality the most indispensable in the composition of a philosopher, and therefore very early set my whole efforts to the attaining of it. And when once I fairly engaged in the work, I did not find it either long or difficult. I had naturally a mild temper, and a sensitive heart, and these gifts were here of inconceivable use to me. Feeling kindly towards my fellow creatures, I could the easier learn to pity rather than hate their faults; to smile, rather than frown at their follies. This was a great step gained, but the next was more difficult — to be slow in pronouncing what is a fault, and what is a folly. Our superstition would haunt with the furies the man who should take his sister to wife, while the customs of Egypt would commend them. How has the astronomer been laughed at, who made the earth revolve round the stationary sun; and yet who can say but the age may come, when this shall be established as a truth? Prejudices, when once seen as prejudices, are easily yielded. The difficulty is to come at the knowledge of them. A thousand lectures had I read to myself, ere I could calmly say, upon all occasions, it does not follow that the thing is, because I think it is; and till I could say this, I never presumed to call myself a philosopher. When I had schooled myself into candor, I found I was possessed of forbearance; for, indeed, it is hardly possible to possess the one without the other.
Good list of online links to her work:
Frances Wright (Wright, Frances, 1795-1852) | The Online Books Page
Making the public domain Loebs more easily downloadable. Book Aligner
Automatic alignment of books between HathiTrust, Internet Archive, Google Books, etc. Latin OCR for Tesseract
Latin OCR training data and tools for Tesseract. Pleiades Static
Fast, static, client-side search and display for the Pleiades gazetteer of ancient places.
PROGRAMMING NOTE FOR THE ZOOM BOOK REVIEW:
Chapter 13 is very short, so we will combine discussion of it with Chapter 14 .
Starting at this point in the thread which discusses Philodemus on Anger are a number of slides / quotes that would also be relevant to today's chapter, both on the issue of anger itself, which is discussed in the first part of the chapter, and as to taking action when appropriate, which is discussed in the second.
I would say that Frances Wright is a little too flatly against "anger" than the Philodemus text reveals, and that she would have been better off with the same subtly she shows to "taking action" and also as to feeling the pain of the death of a loved one - in both of which cases a firm and even emotional response can be appropriate under certain circumstances.
And in fact perhaps the subtly is in fact there, such as in the scene in the prior chapter where Epicurus appears to get angry with Metrodorus for endorsing anger!
Just in case Joshua doesn't get around to posting this again, I want to memorialize his comment:
Of course two seconds after we hang up I think of a this; ambient colors can affect human mood, so that green is restful to the eyes, and red can be used in senior living dining rooms to increase the appetite. Blue and aquariums have a calming effect, hence their use in dentists offices. Yellow may signify danger, as in the bee, wasp, yellow jacket, and the eyes of the snake.
In getting ready for today's podcast I decided to look for any other examples which might exist of ancient or other thought to the effect that the human mind can be affected by the flow of invisible particles. One criteria of significance would need to be that the flow of particles is entirely natural and not in any way supernatural.
Here is my list so far, which is necessarily tentative:
1 - Feng Shui (?) https://en.wikipedia.org/wiki/Feng_shui
Welcome to Episode One Hundred Eighteen of Lucretius Today.
This is a podcast dedicated to the poet Lucretius, who wrote "On The Nature of Things," the only complete presentation of Epicurean philosophy left to us from the ancient world.
I am your host Cassius, and together with our panelists from the EpicureanFriends.com forum, we'll walk you through the ancient Epicurean texts, and we'll discuss how Epicurean philosophy can apply to you today. We encourage you to study Epicurus for yourself, and we suggest the best place to start is the book "Epicurus and His Philosophy" by Canadian professor Norman DeWitt.
If you find the Epicurean worldview attractive, we invite you to join us in the study of Epicurus at EpicureanFriends.com, where you will find a discussion thread for each of our podcast episodes and many other topics.
Today we continue our review of Epicurus' letter to Herodotus, and we move further into fundamental physics.
Now let's join Joshua reading today's text:
Bailey:
[46] Moreover, there are images like in shape to the solid bodies, far surpassing perceptible things in their subtlety of texture. For it is not impossible that such emanations should be formed in that which surrounds the objects, nor that there should be opportunities for the formation of such hollow and thin frames, nor that there should be effluences which preserve the respective position and order which they had before in the solid bodies: these images we call idols.
[47] Next, nothing among perceptible things contradicts the belief that the images have unsurpassable fineness of texture. And for this reason they have also unsurpassable speed of motion, since the movement of all their atoms is uniform, and besides nothing or very few things hinder their emission by collisions, whereas a body composed of many or infinite atoms is at once hindered by collisions.
[48] Besides this, nothing contradicts the belief that the creation of the idols takes place as quick as thought. For the flow of atoms from the surface of bodies is continuous, yet it cannot be detected by any lessening in the size of the object because of the constant filling up of what is lost. The flow of images preserves for a long time the position and order of the atoms in the solid body, though it is occasionally confused. Moreover, compound idols are quickly formed in the air around, because it is not necessary for their substance to be filled in deep inside: and besides there are certain other methods in which existences of this sort are produced. For not one of these beliefs is contradicted by our sensations, if one looks to see in what way sensation will bring us the clear visions from external objects, and in what way again the corresponding sequences of qualities and movements.
[49] Now we must suppose too that it is when something enters us from external objects that we not only see but think of their shapes. For external objects could not make on us an impression of the nature of their own colour and shape by means of the air which lies between us and them, nor again by means of the rays or effluences of any sort which pass from us to them — nearly so well as if models, similar in color and shape, leave the objects and enter according to their respective size either into our sight or into our mind; moving along swiftly, and so by this means reproducing the image of a single continuous thing and preserving the corresponding sequence of qualities and movements from the original object as the result of their uniform contact with us, kept up by the vibration of the atoms deep in the interior of the concrete body.
[50] And every image which we obtain by an act of apprehension on the part of the mind or of the sense-organs, whether of shape or of properties, this image is the shape or the properties of the concrete object, and is produced by the constant repetition of the image or the impression it has left. Now falsehood and error always lie in the addition of opinion with regard to what is waiting to be confirmed or not contradicted, and then is not confirmed or is contradicted.
[51] For the similarity between the things which exist, which we call real and the images received as a likeness of things and produced either in sleep or through some other acts of apprehension on the part of the mind or the other instruments of judgment, could never be, unless there were some effluences of this nature actually brought into contact with our senses. And error would not exist unless another kind of movement too were produced inside ourselves, closely linked to the apprehension of images, but differing from it; and it is owing to this, supposing it is not confirmed, or is contradicted, that falsehood arises; but if it is confirmed or not contradicted, it is true.
[52] Therefore we must do our best to keep this doctrine in mind, in order that on the one hand the standards of judgment dependent on the clear visions may not be undermined, and on the other error may not be as firmly established as truth and so throw all into confusion.
HICKS
[46] Again, there are outlines or films, which are of the same shape as solid bodies, but of a thinness far exceeding that of any object that we see. For it is not impossible that there should be found in the surrounding air combinations of this kind, materials adapted for expressing the hollowness and thinness of surfaces, and effluxes preserving the same relative position and motion which they had in the solid objects from which they come. To these films we give the name of 'images' or 'idols.'
[47] Furthermore, so long as nothing comes in the way to offer resistance, motion through the void accomplishes any imaginable distance in an inconceivably short time. For resistance encountered is the equivalent of slowness, its absence the equivalent of speed.
Not that, if we consider the minute times perceptible by reason alone, the moving body itself arrives at more than one place simultaneously (for this too is inconceivable), although in time perceptible to sense it does arrive simultaneously, however different the point of departure from that conceived by us. For if it changed its direction, that would be equivalent to its meeting with resistance, even if up to that point we allow nothing to impede the rate of its flight. This is an elementary fact which in itself is well worth bearing in mind. In the next place the exceeding thinness of the images is contradicted by none of the facts under our observation. Hence also their velocities are enormous, since they always find a void passage to fit them. Besides, their incessant effluence meets with no resistance, or very little, although many atoms, not to say an unlimited number, do at once encounter resistance.
[48] Besides this, remember that the production of the images is as quick as thought. For particles are continually streaming off from the surface of bodies, though no diminution of the bodies is observed, because other particles take their place. And those given off for a long time retain the position and arrangement which their atoms had when they formed part of the solid bodies, although occasionally they are thrown into confusion. Sometimes such films are formed very rapidly in the air, because they need not have any solid content; and there are other modes in which they may be formed. For there is nothing in all this which is contradicted by sensation, if we in some sort look at the clear evidence of sense, to which we should also refer the continuity of particles in the objects external to ourselves.
[49] We must also consider that it is by the entrance of something coming from external objects that we see their shapes and think of them. For external things would not stamp on us their own nature of colour and form through the medium of the air which is between them and us, or by means of rays of light or currents of any sort going from us to them, so well as by the entrance into our eyes or minds, to whichever their size is suitable, of certain films coming from the things themselves, these films or outlines being of the same colour and shape as the external things themselves. They move with rapid motion; and this again explains why they present the appearance of the single continuous object, and retain the mutual interconnexion which they had in the object, when they impinge upon the sense, such impact being due to the oscillation of the atoms in the interior of the solid object from which they come.
[50] And whatever presentation we derive by direct contact, whether it be with the mind or with the sense-organs, be it shape that is presented or other properties, this shape as presented is the shape of the solid thing, and it is due either to a close coherence of the image as a whole or to a mere remnant of its parts. Falsehood and error always depend upon the intrusion of opinion (when a fact awaits) confirmation or the absence of contradiction, which fact is afterwards frequently not confirmed (or even contradicted) following a certain movement in ourselves connected with, but distinct from, the mental picture presented – which is the cause of error.
[51] For the presentations which, e.g., are received in a picture or arise in dreams, or from any other form of apprehension by the mind or by the other criteria of truth, would never have resembled what we call the real and true things, had it not been for certain actual things of the kind with which we come in contact. Error would not have occurred, if we had not experienced some other movement in ourselves, conjoined with, but distinct from, the perception of what is presented. And from this movement, if it be not confirmed or be contradicted, falsehood results; while, if it be confirmed or not contradicted, truth results.
[52] And to this view we must closely adhere, if we are not to repudiate the criteria founded on the clear evidence of sense, nor again to throw all these things into confusion by maintaining falsehood as if it were truth.
YONGE
[46] Again, there are outlines or films, which are of the same shape as solid bodies, but of a thinness far exceeding that of any object that we see. For it is not impossible that there should be found in the surrounding air combinations of this kind, materials adapted for expressing the hollowness and thinness of surfaces, and effluxes preserving the same relative position and motion which they had in the solid objects from which they come. To these films we give the name of 'images' or 'idols.'
[47] Furthermore, so long as nothing comes in the way to offer resistance, motion through the void accomplishes any imaginable distance in an inconceivably short time. For resistance encountered is the equivalent of slowness, its absence the equivalent of speed.
Not that, if we consider the minute times perceptible by reason alone, the moving body itself arrives at more than one place simultaneously (for this too is inconceivable), although in time perceptible to sense it does arrive simultaneously, however different the point of departure from that conceived by us. For if it changed its direction, that would be equivalent to its meeting with resistance, even if up to that point we allow nothing to impede the rate of its flight. This is an elementary fact which in itself is well worth bearing in mind. In the next place the exceeding thinness of the images is contradicted by none of the facts under our observation. Hence also their velocities are enormous, since they always find a void passage to fit them. Besides, their incessant effluence meets with no resistance, or very little, although many atoms, not to say an unlimited number, do at once encounter resistance.
[48] Besides this, remember that the production of the images is as quick as thought. For particles are continually streaming off from the surface of bodies, though no diminution of the bodies is observed, because other particles take their place. And those given off for a long time retain the position and arrangement which their atoms had when they formed part of the solid bodies, although occasionally they are thrown into confusion. Sometimes such films are formed very rapidly in the air, because they need not have any solid content; and there are other modes in which they may be formed. For there is nothing in all this which is contradicted by sensation, if we in some sort look at the clear evidence of sense, to which we should also refer the continuity of particles in the objects external to ourselves.
[49]We must also consider that it is by the entrance of something coming from external objects that we see their shapes and think of them. For external things would not stamp on us their own nature of colour and form through the medium of the air which is between them and us, or by means of rays of light or currents of any sort going from us to them, so well as by the entrance into our eyes or minds, to whichever their size is suitable, of certain films coming from the things themselves, these films or outlines being of the same colour and shape as the external things themselves. They move with rapid motion; and this again explains why they present the appearance of the single continuous object, and retain the mutual interconnexion which they had in the object, when they impinge upon the sense, such impact being due to the oscillation of the atoms in the interior of the solid object from which they come.
[50] And whatever presentation we derive by direct contact, whether it be with the mind or with the sense-organs, be it shape that is presented or other properties, this shape as presented is the shape of the solid thing, and it is due either to a close coherence of the image as a whole or to a mere remnant of its parts. Falsehood and error always depend upon the intrusion of opinion (when a fact awaits) confirmation or the absence of contradiction, which fact is afterwards frequently not confirmed (or even contradicted) [following a certain movement in ourselves connected with, but distinct from, the mental picture presented - which is the cause of error.]
[51] For the presentations which, e. g., are received in a picture or arise in dreams, or from any other form of apprehension by the mind or by the other criteria of truth, would never have resembled what we call the real and true things, had it not been for certain actual things of the kind with which we come in contact. Error would not have occurred, if we had not experienced some other movement in ourselves, conjoined with, but distinct from, the perception of what is presented. And from this movement, if it be not confirmed or be contradicted, falsehood results; while, if it be confirmed or not contradicted, truth results.
[52] And to this view we must closely adhere, if we are not to repudiate the criteria founded on the clear evidence of sense, nor again to throw all these things into confusion by maintaining falsehood as if it were truth.
Joshua - This is to help me remember to ask you about the source of that information that William Short saved someone (or was saved) from a flooding stream.
That is the first real evidence (speculative though it is to construe it that way) of "cross-pollination" of ideas among Frances Wright and her European friends. I suppose that the idea of dedicating the book to Jeremy Bentham might be another.
The reason this topic comes to mind again is that I read to the end of the book again today to assist in preparing the final chapters, and I was struck that the final chapter was a lot deeper than I remembered. I had our it down in my mind as mainly a broadside against religion, but upon rereading it is almost a "Torquatus-like" summary of many points of the philosophy.
One of the subjects I would like us to cover upon completing the book is this general question I have always had: what do we make of Wright, who has such a commanding understanding of Epicurean philosophy, seemingly devoting so little of the rest of her life to spreading it further?
Is her apparent example something we will all end up following ourselves? Having identified so clearly the details of a philosophy that was so relatively unknown, why not pursue it further?
Was the obstacle of religion so strong in her day that more reconstruction could not be practically attempted? Was she temperamentally more of an activist herself, and was she herself not convinced of the practicality of the approach? I am sure there are other possibilities I am not naming and I am very interested in hearing what others may think.
All of this can and should wait til we get to the end, but I hope those who are interested in the topic will be thinking about it.
Heres a good bio page which does not even mention AFDIA:
Wright, Frances - Freethought Trail - New York
We need to do some "textual criticism" and historical snooping of our own. Where was Wright and what was she doing during the years when AFDIA must have been written?
My standard disclaimer:. I have no intention or thought of taking any credit away from Wright. My exclusive interest is in unearthing more insightful writing on Epicurus. If others were in any way collaborating in any of the preparation of AFDIA, then we may have the ability to find more perceptive writing by others on Epicurus, and the more the better!
The AFDIA Zoom meeting recording for Chapter Ten
Posting of this session will occur very shortly. I have to continue to apologize however for the audio quality. Zoom is clipping some of the speakers (primarily the host!) for some reason that I cannot yet fix. Googling appears to indicate that it is the background noise suppression setting that is at fault, so I will fiddle with that for the next episode.
Yes lots of good information in that article - thank you!
One thing I did not realize is that the article says that there were two Pisos - father and son. The article includes a bust apparently of the son, so I wonder if we shouldn't add to our collection of busts of known Epicureans (we do have one somewhere, don't we? 
) busts of the two Pisos (if both exist).
