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,