Lucretius, De Rerum Natura
William Ellery Leonard, Ed.

     Ere since the birth-time of the world, ere since
The risen first-born day of sea, earth, sun,
Have many germs been added from outside,
Have many seeds been added round about,
Which the great All, the while it flung them on,
Brought hither, that from them the sea and lands
Could grow more big, and that the house of heaven
Might get more room and raise its lofty roofs
Far over earth, and air arise around.
For bodies all, from out all regions, are
Divided by blows, each to its proper thing,
And all retire to their own proper kinds:
The moist to moist retires; earth gets increase
From earthy body; and fires, as on a forge,
Beat out new fire; and ether forges ether;
Till nature, author and ender of the world,
Hath led all things to extreme bound of growth:
As haps when that which hath been poured inside
The vital veins of life is now no more
Than that which ebbs within them and runs off.
This is the point where life for each thing ends;
This is the point where nature with her powers
Curbs all increase. For whatsoe'er thou seest
Grow big with glad increase, and step by step
Climb upward to ripe age, these to themselves
Take in more bodies than they send from selves,
Whilst still the food is easily infused
Through all the veins, and whilst the things are not
So far expanded that they cast away
Such numerous atoms as to cause a waste
Greater than nutriment whereby they wax.
For 'tmust be granted, truly, that from things
Many a body ebbeth and runs off;
But yet still more must come, until the things
Have touched development's top pinnacle;
Then old age breaks their powers and ripe strength
And falls away into a worser part.
For ever the ampler and more wide a thing,
As soon as ever its augmentation ends,
It scatters abroad forthwith to all sides round
More bodies, sending them from out itself.
Nor easily now is food disseminate
Through all its veins; nor is that food enough
To equal with a new supply on hand
Those plenteous exhalations it gives off.
Thus, fairly, all things perish, when with ebbing
They're made less dense and when from blows without
They are laid low; since food at last will fail
Extremest eld, and bodies from outside
Cease not with thumping to undo a thing
And overmaster by infesting blows.