On the nature of things (books 4 - 6)   

By their own weights, have evermore been wont
To be so borne along and in all modes
To meet together and to try all sorts
Which, by combining one with other, they
Are powerful to create: because of this
It comes to pass that those primordials,
Diffused far and wide through mighty aeons,
The while they unions try, and motions too,
Of every kind, meet at the last amain,
And so become oft the commencements fit
Of mighty things- earth, sea, and sky, and race
Of living creatures.
In that long-ago
The wheel of the sun could nowhere be discerned
Flying far up with its abounding blaze,
Nor constellations of the mighty world,
Nor ocean, nor heaven, nor even earth nor air.
Nor aught of things like unto things of ours
Could then be seen- but only some strange storm
And a prodigious hurly-burly mass
Compounded of all kinds of primal germs,
Whose battling discords in disorder kept
Interstices, and paths, coherencies,
And weights, and blows, encounterings, and motions,
Because, by reason of their forms unlike
And varied shapes, they could not all thuswise
Remain conjoined nor harmoniously
Have interplay of movements. But from there
Portions began to fly asunder, and like
With like to join, and to block out a world,
And to divide its members and dispose
Its mightier parts- that is, to set secure
The lofty heavens from the lands, and cause
The sea to spread with waters separate,
And fires of ether separate and pure
Likewise to congregate apart.
For, lo,
First came together the earthy particles
(As being heavy and intertangled) there
In the mid-region, and all began to take
The lowest abodes; and ever the more they got
One with another intertangled, the more
They pressed from out their mass those particles
Which were to form the sea, the stars, the sun,
And moon, and ramparts of the mighty world-
For these consist of seeds more smooth and round
And of much smaller elements than earth.
And thus it was that ether, fraught with fire,
First broke away from out the earthen parts,
Athrough the innumerable pores of earth,
And raised itself aloft, and with itself
Bore lightly off the many starry fires;
And not far otherwise we often see

And the still lakes and the perennial streams
Exhale a mist, and even as earth herself
Is seen at times to smoke, when first at dawn
The light of the sun, the many-rayed, begins
To redden into gold, over the grass
Begemmed with dew. When all of these are brought
Together overhead, the clouds on high
With now concreted body weave a cover
Beneath the heavens. And thuswise ether too,
Light and diffusive, with concreted body