of the nature of things-第22部分
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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。。。
。 。 。 。 。 。
THE SENSES AND MENTAL PICTURES
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；
'
