De Rerum Natura

Lucretius

Lucretius. De Rerum Natura. William Ellery Leonard. E. P. Dutton. 1916.

But if perchance the soul's to be adjudged
Immortal, mainly on ground 'tis kept secure
In vital forces- either because there come
Never at all things hostile to its weal,
Or else because what come somehow retire,
Repelled or ere we feel the harm they work,
. . . . . .
For, lo, besides that, when the frame's diseased,
Soul sickens too, there cometh, many a time,
That which torments it with the things to be,
Keeps it in dread, and wearies it with cares;
And even when evil acts are of the past,
Still gnaw the old transgressions bitterly.
Add, too, that frenzy, peculiar to the mind,
And that oblivion of the things that were;
Add its submergence in the murky waves
Of drowse and torpor.

Therefore death to us
Is nothing, nor concerns us in the least,
Since nature of mind is mortal evermore.
And just as in the ages gone before
We felt no touch of ill, when all sides round
To battle came the Carthaginian host,
And the times, shaken by tumultuous war,
Under the aery coasts of arching heaven
Shuddered and trembled, and all humankind
Doubted to which the empery should fall
By land and sea, thus when we are no more,
When comes that sundering of our body and soul
Through which we're fashioned to a single state,
Verily naught to us, us then no more,
Can come to pass, naught move our senses then-
No, not if earth confounded were with sea,
And sea with heaven. But if indeed do feel
The nature of mind and energy of soul,
After their severance from this body of ours,
Yet nothing 'tis to us who in the bonds
And wedlock of the soul and body live,
Through which we're fashioned to a single state.
And, even if time collected after death
The matter of our frames and set it all
Again in place as now, and if again
To us the light of life were given, O yet
That process too would not concern us aught,
When once the self-succession of our sense
Has been asunder broken. And now and here,
Little enough we're busied with the selves
We were aforetime, nor, concerning them,
Suffer a sore distress. For shouldst thou gaze
Backwards across all yesterdays of time
The immeasurable, thinking how manifold
The motions of matter are, then couldst thou well
Credit this too: often these very seeds
(From which we are to-day) of old were set
In the same order as they are to-day-
Yet this we can't to consciousness recall
Through the remembering mind. For there hath been
An interposed pause of life, and wide
Have all the motions wandered everywhere
From these our senses. For if woe and ail
Perchance are toward, then the man to whom
The bane can happen must himself be there
At that same time. But death precludeth this,
Forbidding life to him on whom might crowd
Such irk and care; and granted 'tis to know:
Nothing for us there is to dread in death,
No wretchedness for him who is no more,
The same estate as if ne'er born before,
When death immortal hath ta'en the mortal life.

Hence, where thou seest a man to grieve because
When dead he rots with body laid away,
Or perishes in flames or jaws of beasts,
Know well: he rings not true, and that beneath
Still works an unseen sting upon his heart,
However he deny that he believes.
His shall be aught of feeling after death.
For he, I fancy, grants not what he says,
Nor what that presupposes, and he fails
To pluck himself with all his roots from life
And cast that self away, quite unawares
Feigning that some remainder's left behind.
For when in life one pictures to oneself
His body dead by beasts and vultures torn,
He pities his state, dividing not himself
Therefrom, removing not the self enough
From the body flung away, imagining
Himself that body, and projecting there
His own sense, as he stands beside it: hence
He grieves that he is mortal born, nor marks
That in true death there is no second self
Alive and able to sorrow for self destroyed,
Or stand lamenting that the self lies there
Mangled or burning. For if it an evil is
Dead to be jerked about by jaw and fang
Of the wild brutes, I see not why 'twere not
Bitter to lie on fires and roast in flames,
Or suffocate in honey, and, reclined
On the smooth oblong of an icy slab,
Grow stiff in cold, or sink with load of earth
Down-crushing from above.

"Thee now no more
The joyful house and best of wives shall welcome,
Nor little sons run up to snatch their kisses
And touch with silent happiness thy heart.
Thou shalt not speed in undertakings more,
Nor be the warder of thine own no more.
Poor wretch," they say, "one hostile hour hath ta'en
Wretchedly from thee all life's many guerdons,"
But add not, "yet no longer unto thee
Remains a remnant of desire for them"
If this they only well perceived with mind
And followed up with maxims, they would free
Their state of man from anguish and from fear.
"O even as here thou art, aslumber in death,
So shalt thou slumber down the rest of time,
Released from every harrying pang. But we,
We have bewept thee with insatiate woe,
Standing beside whilst on the awful pyre
Thou wert made ashes; and no day shall take
For us the eternal sorrow from the breast."
But ask the mourner what's the bitterness
That man should waste in an eternal grief,
If, after all, the thing's but sleep and rest?
For when the soul and frame together are sunk
In slumber, no one then demands his self
Or being. Well, this sleep may be forever,
Without desire of any selfhood more,
For all it matters unto us asleep.
Yet not at all do those primordial germs
Roam round our members, at that time, afar
From their own motions that produce our senses-
Since, when he's startled from his sleep, a man
Collects his senses. Death is, then, to us
Much less- if there can be a less than that
Which is itself a nothing: for there comes
Hard upon death a scattering more great
Of the throng of matter, and no man wakes up
On whom once falls the icy pause of life.
This too, O often from the soul men say,
Along their couches holding of the cups,
With faces shaded by fresh wreaths awry:
"Brief is this fruit of joy to paltry man,
Soon, soon departed, and thereafter, no,
It may not be recalled."- As if, forsooth,
It were their prime of evils in great death
To parch, poor tongues, with thirst and arid drought,
Or chafe for any lack.

Once more, if Nature
Should of a sudden send a voice abroad,
And her own self inveigh against us so:
"Mortal, what hast thou of such grave concern
That thou indulgest in too sickly plaints?
Why this bemoaning and beweeping death?
For if thy life aforetime and behind
To thee was grateful, and not all thy good
Was heaped as in sieve to flow away
And perish unavailingly, why not,
Even like a banqueter, depart the halls,
Laden with life? why not with mind content
Take now, thou fool, thy unafflicted rest?
But if whatever thou enjoyed hath been
Lavished and lost, and life is now offence,
Why seekest more to add- which in its turn
Will perish foully and fall out in vain?
O why not rather make an end of life,
Of labour? For all I may devise or find
To pleasure thee is nothing: all things are
The same forever. Though not yet thy body
Wrinkles with years, nor yet the frame exhausts
Outworn, still things abide the same, even if
Thou goest on to conquer all of time
With length of days, yea, if thou never diest"-
What were our answer, but that Nature here
Urges just suit and in her words lays down
True cause of action? Yet should one complain,
Riper in years and elder, and lament,
Poor devil, his death more sorely than is fit,
Then would she not, with greater right, on him
Cry out, inveighing with a voice more shrill:
"Off with thy tears, and choke thy whines, buffoon!
Thou wrinklest- after thou hast had the sum
Of the guerdons of life; yet, since thou cravest ever
What's not at hand, contemning present good,
That life has slipped away, unperfected
And unavailing unto thee. And now,
Or ere thou guessed it, death beside thy head
Stands- and before thou canst be going home
Sated and laden with the goodly feast.
But now yield all that's alien to thine age,-
Up, with good grace! make room for sons: thou must."
Justly, I fancy, would she reason thus,
Justly inveigh and gird: since ever the old
Outcrowded by the new gives way, and ever
The one thing from the others is repaired.
Nor no man is consigned to the abyss
Of Tartarus, the black. For stuff must be,
That thus the after-generations grow,-
Though these, their life completed, follow thee;
And thus like thee are generations all-
Already fallen, or some time to fall.
So one thing from another rises ever;
And in fee-simple life is given to none,
But unto all mere usufruct.
Look back:
Nothing to us was all fore-passed eld
Of time the eternal, ere we had a birth.
And Nature holds this like a mirror up
Of time-to-be when we are dead and gone.
And what is there so horrible appears?
Now what is there so sad about it all?
Is't not serener far than any sleep?

And, verily, those tortures said to be
In Acheron, the deep, they all are ours
Here in this life. No Tantalus, benumbed
With baseless terror, as the fables tell,
Fears the huge boulder hanging in the air:
But, rather, in life an empty dread of Gods
Urges mortality, and each one fears
Such fall of fortune as may chance to him.
Nor eat the vultures into Tityus
Prostrate in Acheron, nor can they find,
Forsooth, throughout eternal ages, aught
To pry around for in that mighty breast.
However hugely he extend his bulk-
Who hath for outspread limbs not acres nine,
But the whole earth- he shall not able be
To bear eternal pain nor furnish food
From his own frame forever. But for us
A Tityus is he whom vultures rend
Prostrate in love, whom anxious anguish eats,
Whom troubles of any unappeased desires
Asunder rip. We have before our eyes
Here in this life also a Sisyphus
In him who seeketh of the populace
The rods, the axes fell, and evermore
Retires a beaten and a gloomy man.
For to seek after power- an empty name,
Nor given at all- and ever in the search
To endure a world of toil, O this it is
To shove with shoulder up the hill a stone
Which yet comes rolling back from off the top,
And headlong makes for levels of the plain.
Then to be always feeding an ingrate mind,
Filling with good things, satisfying never-
As do the seasons of the year for us,
When they return and bring their progenies
And varied charms, and we are never filled
With the fruits of life- O this, I fancy, 'tis
To pour, like those young virgins in the tale,
Waters into a sieve, unfilled forever.
. . . . . .
Cerberus and Furies, and that Lack of Light
. . . . . .
Tartarus, out-belching from his mouth the surge
Of horrible heat- the which are nowhere, nor
Indeed can be: but in this life is fear
Of retributions just and expiations
For evil acts: the dungeon and the leap
From that dread rock of infamy, the stripes,
The executioners, the oaken rack,
The iron plates, bitumen, and the torch.
And even though these are absent, yet the mind,
With a fore-fearing conscience, plies its goads
And burns beneath the lash, nor sees meanwhile
What terminus of ills, what end of pine
Can ever be, and feareth lest the same
But grow more heavy after death. Of truth,
The life of fools is Acheron on earth.

This also to thy very self sometimes
Repeat thou mayst: "Lo, even good Ancus left
The sunshine with his eyes, in divers things
A better man than thou, O worthless hind;
And many other kings and lords of rule
Thereafter have gone under, once who swayed
O'er mighty peoples. And he also, he-
Who whilom paved a highway down the sea,
And gave his legionaries thoroughfare
Along the deep, and taught them how to cross
The pools of brine afoot, and did contemn,
Trampling upon it with his cavalry,
The bellowings of ocean- poured his soul
From dying body, as his light was ta'en.
And Scipio's son, the thunderbolt of war,
Horror of Carthage, gave his bones to earth,
Like to the lowliest villein in the house.
Add finders-out of sciences and arts;
Add comrades of the Heliconian dames,
Among whom Homer, sceptered o'er them all,
Now lies in slumber sunken with the rest.
Then, too, Democritus, when ripened eld
Admonished him his memory waned away,
Of own accord offered his head to death.
Even Epicurus went, his light of life
Run out, the man in genius who o'er-topped
The human race, extinguishing all others,
As sun, in ether arisen, all the stars.
Wilt thou, then, dally, thou complain to go?-
For whom already life's as good as dead,
Whilst yet thou livest and lookest?- who in sleep
Wastest thy life- time's major part, and snorest
Even when awake, and ceasest not to see
The stuff of dreams, and bearest a mind beset
By baseless terror, nor discoverest oft
What's wrong with thee, when, like a sotted wretch,
Thou'rt jostled along by many crowding cares,
And wanderest reeling round, with mind aswim."

If men, in that same way as on the mind
They feel the load that wearies with its weight,
Could also know the causes whence it comes,
And why so great the heap of ill on heart,
O not in this sort would they live their life,
As now so much we see them, knowing not
What 'tis they want, and seeking ever and ever
A change of place, as if to drop the burden.
The man who sickens of his home goes out,
Forth from his splendid halls, and straight- returns,
Feeling i'faith no better off abroad.
He races, driving his Gallic ponies along,
Down to his villa, madly,- as in haste
To hurry help to a house afire.- At once
He yawns, as soon as foot has touched the threshold,
Or drowsily goes off in sleep and seeks
Forgetfulness, or maybe bustles about
And makes for town again. In such a way
Each human flees himself- a self in sooth,
As happens, he by no means can escape;
And willy-nilly he cleaves to it and loathes,
Sick, sick, and guessing not the cause of ail.
Yet should he see but that, O chiefly then,
Leaving all else, he'd study to divine
The nature of things, since here is in debate
Eternal time and not the single hour,
Mortal's estate in whatsoever remains
After great death.

And too, when all is said,
What evil lust of life is this so great
Subdues us to live, so dreadfully distraught
In perils and alarms? one fixed end
Of life abideth for mortality;
Death's not to shun, and we must go to meet.
Besides we're busied with the same devices,
Ever and ever, and we are at them ever,
And there's no new delight that may be forged
By living on. But whilst the thing we long for
Is lacking, that seems good above all else;
Thereafter, when we've touched it, something else
We long for; ever one equal thirst of life
Grips us agape. And doubtful 'tis what fortune
The future times may carry, or what be
That chance may bring, or what the issue next
Awaiting us. Nor by prolonging life
Take we the least away from death's own time,
Nor can we pluck one moment off, whereby
To minish the aeons of our state of death.
Therefore, O man, by living on, fulfil
As many generations as thou may:
Eternal death shall there be waiting still;
And he who died with light of yesterday
Shall be no briefer time in death's No-more
Than he who perished months or years before.

I wander afield, thriving in sturdy thought,
Through unpathed haunts of the Pierides,
Trodden by step of none before. I joy
To come on undefiled fountains there,
To drain them deep; I joy to pluck new flowers,
To seek for this my head a signal crown
From regions where the Muses never yet
Have garlanded the temples of a man:
First, since I teach concerning mighty things,
And go right on to loose from round the mind
The tightened coils of dread religion;
Next, since, concerning themes so dark, I frame
Song so pellucid, touching all throughout
Even with the Muses' charm- which, as 'twould seem,
Is not without a reasonable ground:
For as physicians, when they seek to give
Young boys the nauseous wormwood, first do touch
The brim around the cup with the sweet juice
And yellow of the honey, in order that
The thoughtless age of boyhood be cajoled
As far as the lips, and meanwhile swallow down
The wormwood's bitter draught, and, though befooled,
Be yet not merely duped, but rather thus
Grow strong again with recreated health:
So now I too (since this my doctrine seems
In general somewhat woeful unto those
Who've had it not in hand, and since the crowd
Starts back from it in horror) have desired
To expound our doctrine unto thee in song
Soft-speaking and Pierian, and, as 'twere,
To touch it with sweet honey of the Muse-
If by such method haply I might hold
The mind of thee upon these lines of ours,
Till thou dost learn the nature of all things
And understandest their utility.

But since I've taught already of what sort
The seeds of all things are, and how distinct
In divers forms they flit of own accord,
Stirred with a motion everlasting on,
And in what mode things be from them create,
And since I've taught what the mind's nature is,
And of what things 'tis with the body knit
And thrives in strength, and by what mode uptorn
That mind returns to its primordials,
Now will I undertake an argument-
One for these matters of supreme concern-
That there exist those somewhats which we call
The images of things: these, like to films
Scaled off the utmost outside of the things,
Flit hither and thither through the atmosphere,
And the same terrify our intellects,
Coming upon us waking or in sleep,
When oft we peer at wonderful strange shapes
And images of people lorn of light,
Which oft have horribly roused us when we lay
In slumber- that haply nevermore may we
Suppose that souls get loose from Acheron,
Or shades go floating in among the living,
Or aught of us is left behind at death,
When body and mind, destroyed together, each
Back to its own primordials goes away.
And thus I say that effigies of things,
And tenuous shapes from off the things are sent,
From off the utmost outside of the things,
Which are like films or may be named a rind,
Because the image bears like look and form
With whatso body has shed it fluttering forth-
A fact thou mayst, however dull thy wits,

Well learn from this: mainly, because we see
Even 'mongst visible objects many be
That send forth bodies, loosely some diffused-
Like smoke from oaken logs and heat from fires-
And some more interwoven and condensed-
As when the locusts in the summertime
Put off their glossy tunics, or when calves
At birth drop membranes from their body's surface,
Or when, again, the slippery serpent doffs
Its vestments 'mongst the thorns- for oft we see
The breres augmented with their flying spoils:
Since such takes place, 'tis likewise certain too
That tenuous images from things are sent,
From off the utmost outside of the things.
For why those kinds should drop and part from things,
Rather than others tenuous and thin,
No power has man to open mouth to tell;
Especially, since on outsides of things
Are bodies many and minute which could,
In the same order which they had before,
And with the figure of their form preserved,
Be thrown abroad, and much more swiftly too,
Being less subject to impediments,
As few in number and placed along the front.
For truly many things we see discharge
Their stuff at large, not only from their cores
Deep-set within, as we have said above,
But from their surfaces at times no less-
Their very colours too. And commonly
The awnings, saffron, red and dusky blue,
Stretched overhead in mighty theatres,
Upon their poles and cross-beams fluttering,
Have such an action quite; for there they dye
And make to undulate with their every hue
The circled throng below, and all the stage,
And rich attire in the patrician seats.
And ever the more the theatre's dark walls
Around them shut, the more all things within
Laugh in the bright suffusion of strange glints,
The daylight being withdrawn. And therefore, since
The canvas hangings thus discharge their dye
From off their surface, things in general must
Likewise their tenuous effigies discharge,
Because in either case they are off-thrown
From off the surface. So there are indeed
Such certain prints and vestiges of forms
Which flit around, of subtlest texture made,
Invisible, when separate, each and one.

Again, all odour, smoke, and heat, and such
Streams out of things diffusedly, because,
Whilst coming from the deeps of body forth
And rising out, along their bending path
They're torn asunder, nor have gateways straight
Wherethrough to mass themselves and struggle abroad.
But contrariwise, when such a tenuous film
Of outside colour is thrown off, there's naught
Can rend it, since 'tis placed along the front
Ready to hand. Lastly those images
Which to our eyes in mirrors do appear,
In water, or in any shining surface,
Must be, since furnished with like look of things,
Fashioned from images of things sent out.
There are, then, tenuous effigies of forms,
Like unto them, which no one can divine
When taken singly, which do yet give back,
When by continued and recurrent discharge
Expelled, a picture from the mirrors' plane.
Nor otherwise, it seems, can they be kept
So well conserved that thus be given back
Figures so like each object.

Now then, learn
How tenuous is the nature of an image.
And in the first place, since primordials be
So far beneath our senses, and much less
E'en than those objects which begin to grow
Too small for eyes to note, learn now in few
How nice are the beginnings of all things-
That this, too, I may yet confirm in proof:
First, living creatures are sometimes so small
That even their third part can nowise be seen;
Judge, then, the size of any inward organ-
What of their sphered heart, their eyes, their limbs,
The skeleton?- How tiny thus they are!
And what besides of those first particles
Whence soul and mind must fashioned be?- Seest not
How nice and how minute? Besides, whatever
Exhales from out its body a sharp smell-
The nauseous absinth, or the panacea,
Strong southernwood, or bitter centaury-
If never so lightly with thy [fingers] twain
Perchance [thou touch] a one of them
. . . . . .
Then why not rather know that images
Flit hither and thither, many, in many modes,
Bodiless and invisible?
But lest
Haply thou holdest that those images
Which come from objects are the sole that flit,
Others indeed there be of own accord
Begot, self-formed in earth's aery skies,
Which, moulded to innumerable shapes,
Are borne aloft, and, fluid as they are,
Cease not to change appearance and to turn
Into new outlines of all sorts of forms;
As we behold the clouds grow thick on high
And smirch the serene vision of the world,
Stroking the air with motions. For oft are seen
The giants' faces flying far along
And trailing a spread of shadow; and at times
The mighty mountains and mountain-sundered rocks
Going before and crossing on the sun,
Whereafter a monstrous beast dragging amain
And leading in the other thunderheads.

Now [hear] how easy and how swift they be
Engendered, and perpetually flow off
From things and gliding pass away....
. . . . . .
For ever every outside streams away
From off all objects, since discharge they may;
And when this outside reaches other things,
As chiefly glass, it passes through; but where
It reaches the rough rocks or stuff of wood,
There 'tis so rent that it cannot give back
An image. But when gleaming objects dense,
As chiefly mirrors, have been set before it,
Nothing of this sort happens. For it can't
Go, as through glass, nor yet be rent- its safety,
By virtue of that smoothness, being sure.
'Tis therefore that from them the images
Stream back to us; and howso suddenly
Thou place, at any instant, anything
Before a mirror, there an image shows;
Proving that ever from a body's surface
Flow off thin textures and thin shapes of things.
Thus many images in little time
Are gendered; so their origin is named
Rightly a speedy. And even as the sun
Must send below, in little time, to earth
So many beams to keep all things so full
Of light incessant; thus, on grounds the same,
From things there must be borne, in many modes,
To every quarter round, upon the moment,
The many images of things; because
Unto whatever face of things we turn
The mirror, things of form and hue the same
Respond. Besides, though but a moment since
Serenest was the weather of the sky,
So fiercely sudden is it foully thick
That ye might think that round about all murk
Had parted forth from Acheron and filled
The mighty vaults of sky- so grievously,
As gathers thus the storm-clouds' gruesome night,
Do faces of black horror hang on high-
Of which how small a part an image is
There's none to tell or reckon out in words.

Now come; with what swift motion they are borne,
These images, and what the speed assigned
To them across the breezes swimming on-
So that o'er lengths of space a little hour
Alone is wasted, toward whatever region
Each with its divers impulse tends- I'll tell
In verses sweeter than they many are;
Even as the swan's slight note is better far
Than that dispersed clamour of the cranes
Among the southwind's aery clouds. And first,
One oft may see that objects which are light
And made of tiny bodies are the swift;
In which class is the sun's light and his heat,
Since made from small primordial elements
Which, as it were, are forward knocked along
And through the interspaces of the air
To pass delay not, urged by blows behind;
For light by light is instantly supplied
And gleam by following gleam is spurred and driven.
Thus likewise must the images have power
Through unimaginable space to speed
Within a point of time,- first, since a cause
Exceeding small there is, which at their back
Far forward drives them and propels, where, too,
They're carried with such winged lightness on;
And, secondly, since furnished, when sent off,
With texture of such rareness that they can
Through objects whatsoever penetrate
And ooze, as 'twere, through intervening air.

Besides, if those fine particles of things
Which from so deep within are sent abroad,
As light and heat of sun, are seen to glide
And spread themselves through all the space of heaven
Upon one instant of the day, and fly
O'er sea and lands and flood the heaven, what then
Of those which on the outside stand prepared,
When they're hurled off with not a thing to check
Their going out? Dost thou not see indeed
How swifter and how farther must they go
And speed through manifold the length of space
In time the same that from the sun the rays
O'erspread the heaven? This also seems to be
Example chief and true with what swift speed
The images of things are borne about:
That soon as ever under open skies
Is spread the shining water, all at once,
If stars be out in heaven, upgleam from earth,
Serene and radiant in the water there,
The constellations of the universe-
Now seest thou not in what a point of time
An image from the shores of ether falls
Unto the shores of earth? Wherefore, again,
And yet again, 'tis needful to confess
With wondrous...
. . . . . .

Bodies that strike the eyes, awaking sight.
From certain things flow odours evermore,
As cold from rivers, heat from sun, and spray
From waves of ocean, eater-out of walls
Around the coasts. Nor ever cease to flit
The varied voices, sounds athrough the air.
Then too there comes into the mouth at times
The wet of a salt taste, when by the sea
We roam about; and so, whene'er we watch
The wormword being mixed, its bitter stings.
To such degree from all things is each thing
Borne streamingly along, and sent about
To every region round; and nature grants
Nor rest nor respite of the onward flow,
Since 'tis incessantly we feeling have,
And all the time are suffered to descry
And smell all things at hand, and hear them sound.

Besides, since shape examined by our hands
Within the dark is known to be the same
As that by eyes perceived within the light
And lustrous day, both touch and sight must be
By one like cause aroused. So, if we test
A square and get its stimulus on us
Within the dark, within the light what square
Can fall upon our sight, except a square
That images the things? Wherefore it seems
The source of seeing is in images,
Nor without these can anything be viewed.
Now these same films I name are borne about
And tossed and scattered into regions all.
But since we do perceive alone through eyes,
It follows hence that whitherso we turn
Our sight, all things do strike against it there
With form and hue. And just how far from us
Each thing may be away, the image yields
To us the power to see and chance to tell:
For when 'tis sent, at once it shoves ahead
And drives along the air that's in the space
Betwixt it and our eyes. And thus this air
All glides athrough our eyeballs, and, as 'twere,
Brushes athrough our pupils and thuswise
Passes across. Therefore it comes we see
How far from us each thing may be away,
And the more air there be that's driven before,
And too the longer be the brushing breeze
Against our eyes, the farther off removed
Each thing is seen to be: forsooth, this work
With mightily swift order all goes on,
So that upon one instant we may see
What kind the object and how far away.
Nor over-marvellous must this be deemed
In these affairs that, though the films which strike
Upon the eyes cannot be singly seen,
The things themselves may be perceived. For thus
When the wind beats upon us stroke by stroke
And when the sharp cold streams, 'tis not our wont
To feel each private particle of wind
Or of that cold, but rather all at once;
And so we see how blows affect our body,
As if one thing were beating on the same
And giving us the feel of its own body
Outside of us. Again, whene'er we thump
With finger-tip upon a stone, we touch
But the rock's surface and the outer hue,
Nor feel that hue by contact- rather feel
The very hardness deep within the rock.

Now come, and why beyond a looking-glass
An image may be seen, perceive. For seen
It soothly is, removed far within.
'Tis the same sort as objects peered upon
Outside in their true shape, whene'er a door
Yields through itself an open peering-place,
And lets us see so many things outside
Beyond the house. Also that sight is made
By a twofold twin air: for first is seen
The air inside the door-posts; next the doors,
The twain to left and right; and afterwards
A light beyond comes brushing through our eyes,
Then other air, then objects peered upon
Outside in their true shape. And thus, when first
The image of the glass projects itself,
As to our gaze it comes, it shoves ahead
And drives along the air that's in the space
Betwixt it and our eyes, and brings to pass
That we perceive the air ere yet the glass.
But when we've also seen the glass itself,
Forthwith that image which from us is borne
Reaches the glass, and there thrown back again
Comes back unto our eyes, and driving rolls
Ahead of itself another air, that then
'Tis this we see before itself, and thus
It looks so far removed behind the glass.
Wherefore again, again, there's naught for wonder
. . . . . .
In those which render from the mirror's plane
A vision back, since each thing comes to pass
By means of the two airs. Now, in the glass
The right part of our members is observed
Upon the left, because, when comes the image
Hitting against the level of the glass,
'Tis not returned unshifted; but forced off
Backwards in line direct and not oblique,-
Exactly as whoso his plaster-mask
Should dash, before 'twere dry, on post or beam,
And it should straightway keep, at clinging there,
Its shape, reversed, facing him who threw,
And so remould the features it gives back:
It comes that now the right eye is the left,
The left the right.