De Rerum Natura

From forth the sun's own fire, albeit that fire

Be not a great, may permeate the air

With the fierce hot- if but, perchance, the air

Be of condition and so tempered then

As to be kindled, even when beat upon

Only by little particles of heat-

Just as we sometimes see the standing grain

Or stubble straw in conflagration all

From one lone spark. And possibly the sun,

Agleam on high with rosy lampion,

Possesses about him with invisible heats

A plenteous fire, by no effulgence marked,

So that he maketh, he, the Fraught-with-fire,

Increase to such degree the force of rays.

Nor is there one sure cause revealed to men

How the sun journeys from his summer haunts

On to the mid-most winter turning-points

In Capricorn, the thence reverting veers

Back to solstitial goals of Cancer; nor

How 'tis the moon is seen each month to cross

That very distance which in traversing

The sun consumes the measure of a year.

I say, no one clear reason hath been given

For these affairs. Yet chief in likelihood

Seemeth the doctrine which the holy thought

Of great Democritus lays down: that ever

The nearer the constellations be to earth

The less can they by whirling of the sky

Be borne along, because those skiey powers

Of speed aloft do vanish and decrease

In under-regions, and the sun is thus

Left by degrees behind amongst those signs

That follow after, since the sun he lies

Far down below the starry signs that blaze;

And the moon lags even tardier than the sun:

In just so far as is her course removed

From upper heaven and nigh unto the lands,

In just so far she fails to keep the pace

With starry signs above; for just so far

As feebler is the whirl that bears her on,

(Being, indeed, still lower than the sun),

In just so far do all the starry signs,

Circling around, o'ertake her and o'erpass.

Therefore it happens that the moon appears

More swiftly to return to any sign

Along the Zodiac, than doth the sun,

Because those signs do visit her again

More swiftly than they visit the great sun.

It can be also that two streams of air

Alternately at fixed periods

Blow out from transverse regions of the world,

Of which the one may thrust the sun away

From summer-signs to mid-most winter goals

And rigors of the cold, and the other then

May cast him back from icy shades of chill

Even to the heat-fraught regions and the signs

That blaze along the Zodiac. So, too,

We must suppose the moon and all the stars,

Which through the mighty and sidereal years

Roll round in mighty orbits, may be sped

By streams of air from regions alternate.

Seest thou not also how the clouds be sped

By contrary winds to regions contrary,

The lower clouds diversely from the upper?

Then, why may yonder stars in ether there

Along their mighty orbits not be borne

By currents opposite the one to other?

But night o'erwhelms the lands with vasty murk

Either when sun, after his diurnal course,

Hath walked the ultimate regions of the sky

And wearily hath panted forth his fires,

Shivered by their long journeying and wasted

By traversing the multitudinous air,

Or else because the self-same force that drave

His orb along above the lands compels

Him then to turn his course beneath the lands.

Matuta also at a fixed hour

Spreadeth the roseate morning out along

The coasts of heaven and deploys the light,

Either because the self-same sun, returning

Under the lands, aspires to seize the sky,

Striving to set it blazing with his rays

Ere he himself appear, or else because

Fires then will congregate and many seeds

Of heat are wont, even at a fixed time,

To stream together- gendering evermore

New suns and light. Just so the story goes

That from the Idaean mountain-tops are seen

Dispersed fires upon the break of day

Which thence combine, as 'twere, into one ball

And form an orb. Nor yet in these affairs

Is aught for wonder that these seeds of fire

Can thus together stream at time so fixed

And shape anew the splendour of the sun.

For many facts we see which come to pass

At fixed time in all things: burgeon shrubs

At fixed time, and at a fixed time

They cast their flowers; and Eld commands the teeth,

At time as surely fixed, to drop away,

And Youth commands the growing boy to bloom