Lucretius, De Rerum Natura
William Ellery Leonard, Ed.

     Right here remains
A certain slender means to skulk from truth,
Which Anaxagoras takes unto himself,
Who holds that all things lurk commixed with all
While that one only comes to view, of which
The bodies exceed in number all the rest,
And lie more close to hand and at the fore-
A notion banished from true reason far.
For then 'twere meet that kernels of the grains
Should oft, when crunched between the might of stones,
Give forth a sign of blood, or of aught else
Which in our human frame is fed; and that
Rock rubbed on rock should yield a gory ooze.
Likewise the herbs ought oft to give forth drops
Of sweet milk, flavoured like the uddered sheep's;
Indeed we ought to find, when crumbling up
The earthy clods, there herbs, and grains, and leaves,
All sorts dispersed minutely in the soil;
Lastly we ought to find in cloven wood
Ashes and smoke and bits of fire there hid.
But since fact teaches this is not the case,
'Tis thine to know things are not mixed with things
Thuswise; but seeds, common to many things,
Commixed in many ways, must lurk in things.
     "But often it happens on skiey hills" thou sayest,
"That neighbouring tops of lofty trees are rubbed
One against other, smote by the blustering south,
Till all ablaze with bursting flower of flame."
Good sooth- yet fire is not ingraft in wood,
But many are the seeds of heat, and when
Rubbing together they together flow,
They start the conflagrations in the forests.
Whereas if flame, already fashioned, lay
Stored up within the forests, then the fires
Could not for any time be kept unseen,
But would be laying all the wildwood waste
And burning all the boscage. Now dost see
(Even as we said a little space above)
How mightily it matters with what others,
In what positions these same primal germs
Are bound together? And what motions, too,
They give and get among themselves? how, hence,
The same, if altered 'mongst themselves, can body
Both igneous and ligneous objects forth-
Precisely as these words themselves are made
By somewhat altering their elements,
Although we mark with name indeed distinct
The igneous from the ligneous. Once again,
If thou suppose whatever thou beholdest,
Among all visible objects, cannot be,
Unless thou feign bodies of matter endowed
With a like nature,- by thy vain device
For thee will perish all the germs of things:
'Twill come to pass they'll laugh aloud, like men,
Shaken asunder by a spasm of mirth,
Or moisten with salty tear-drops cheeks and chins.