o the frame
And keep the stomach in a moist career.

Now, how it is we see some food for some,
Others for others....

*****

I will unfold, or wherefore what to some
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 withi