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Is foul and bitter； yet the same to others
Can seem delectable to eat；… why here
So great the distance and the difference is
That what is food to one to some becomes
Fierce poison； as a certain snake there is
Which； touched by spittle of a man； will waste
And end itself by gnawing up its coil。
Again； fierce poison is the hellebore
To us； but puts the fat on goats and quails。
That thou mayst know by what devices this
Is brought about； in chief thou must recall
What we have said before； that seeds are kept
Commixed in things in divers modes。 Again；
As all the breathing creatures which take food
Are outwardly unlike； and outer cut
And contour of their members bounds them round；
Each differing kind by kind； they thus consist
Of seeds of varying shape。 And furthermore；
Since seeds do differ； divers too must be
The interstices and paths （which we do call
The apertures） in all the members； even
In mouth and palate too。 Thus some must be
More small or yet more large； three…cornered some
And others squared； and many others round；
And certain of them many…angled too
In many modes。 For； as the combination
And motion of their divers shapes demand；
The shapes of apertures must be diverse
And paths must vary according to their walls
That bound them。 Hence when what is sweet to some；
Becomes to others bitter； for him to whom
'Tis sweet； the smoothest particles must needs
Have entered caressingly the palate's pores。
And； contrariwise； with those to whom that sweet
Is sour within the mouth； beyond a doubt
The rough and barbed particles have got
Into the narrows of the apertures。
Now easy it is from these affairs to know
Whatever。。。
。 。 。 。 。 。
Indeed； where one from o'er…abundant bile
Is stricken with fever； or in other wise
Feels the roused violence of some malady；
There the whole frame is now upset； and there
All the positions of the seeds are changed；…
So that the bodies which before were fit
To cause the savour； now are fit no more；
And now more apt are others which be able
To get within the pores and gender sour。
Both sorts； in sooth； are intermixed in honey…
What oft we've proved above to thee before。
Now come； and I will indicate what wise
Impact of odour on the nostrils touches。
And first； 'tis needful there be many things
From whence the streaming flow of varied odours
May roll along； and we're constrained to think
They stream and dart and sprinkle themselves about
Impartially。 But for some breathing creatures
One odour is more apt； to others another…
Because of differing forms of seeds and pores。
Thus on and on along the zephyrs bees
Are led by odour of honey； vultures too
By carcasses。 Again； the forward power
Of scent in dogs doth lead the hunter on
Whithersoever the splay…foot of wild beast
Hath hastened its career； and the white goose；
The saviour of the Roman citadel；
Forescents afar the odour of mankind。
Thus； diversly to divers ones is given
Peculiar smell that leadeth each along
To his own food or makes him start aback
From loathsome poison； and in this wise are
The generations of the wild preserved。
Yet is this pungence not alone in odours
Or in the class of flavours； but； likewise；
The look of things and hues agree not all
So well with senses unto all； but that
Some unto some will be； to gaze upon；
More keen and painful。 Lo； the raving lions；
They dare not face and gaze upon the cock
Who's wont with wings to flap away the night
From off the stage； and call the beaming morn
With clarion voice… and lions straightway thus
Bethink themselves of flight； because； ye see；
Within the body of the cocks there be
Some certain seeds； which； into lions' eyes
Injected； bore into the pupils deep
And yield such piercing pain they can't hold out
Against the cocks； however fierce they be…
Whilst yet these seeds can't hurt our gaze the least；
Either because they do not penetrate；
Or since they have free exit from the eyes
As soon as penetrating； so that thus
They cannot hurt our eyes in any part
By there remaining。
To speak once more of odour；
Whatever assail the nostrils； some can travel
A longer way than others。 None of them；
However； 's borne so far as sound or voice…
While I omit all mention of such things
As hit the eyesight and assail the vision。
For slowly on a wandering course it comes
And perishes sooner； by degrees absorbed
Easily into all the winds of air；…
And first； because from deep inside the thing
It is discharged with labour （for the fact
That every object； when 'tis shivered； ground；
Or crumbled by the fire； will smell the stronger
Is sign that odours flow and part away
From inner regions of the things）。 And next；
Thou mayest see that odour is create
Of larger primal germs than voice； because
It enters not through stony walls； wherethrough
Unfailingly the voice and sound are borne；
Wherefore； besides； thou wilt observe 'tis not
So easy to trace out in whatso place
The smelling object is。 For； dallying on
Along the winds； the particles cool off；
And then the scurrying messengers of things
Arrive our senses； when no longer hot。
So dogs oft wander astray； and hunt the scent。
Now mark； and hear what objects move the mind；
And learn； in few； whence unto intellect
Do come what come。 And first I tell thee this：
That many images of objects rove
In many modes to every region round…
So thin that easily the one with other；
When once they meet； uniteth in mid…air；
Like gossamer or gold…leaf。 For； indeed；
Far thinner are they in their fabric than
Those images which take a hold on eyes
And smite the vision； since through body's pores
They penetrate； and inwardly stir up
The subtle nature of mind and smite the sense。
Thus； Centaurs and the limbs of Scyllas； thus
The Cerberus…visages of dogs we see；
And images of people gone before…
Dead men whose bones earth bosomed long ago；
Because the images of every kind
Are everywhere about us borne… in part
Those which are gendered in the very air
Of own accord； in part those others which
From divers things do part away； and those
Which are compounded； made from out their shapes。
For soothly from no living Centaur is
That phantom gendered； since no breed of beast
Like him was ever； but； when images
Of horse and man by chance have come together；
They easily cohere； as aforesaid；
At once； through subtle nature and fabric thin。
In the same fashion others of this ilk
Created are。 And when they're quickly borne
In their exceeding lightness； easily
（As earlier I showed） one subtle image；
Compounded； moves by its one blow the mind；
Itself so subtle and so strangely quick。
That these things come to pass as I record；
From this thou easily canst understand：
So far as one is unto other like；
Seeing with mind as well as with the eyes
Must come to pass in fashion not unlike。
Well； now； since I have shown that I perceive
Haply a lion through those idol…films
Such as assail my eyes； 'tis thine to know
Also the mind is in like manner moved；
And sees； nor more nor less than eyes do see
（Except that it perceives more subtle films）
The lion and aught else through idol…films。
And when the sleep has overset