De Rerum Natura

Is by their strokes made manifest and by

The brand-marks of their searing heat on things,

And by the scorched scars exhaling round

The heavy fumes of sulphur. For all these

Are marks, O not of wind or rain, but fire.

Again, they often enkindle even the roofs

Of houses and inside the very rooms

With swift flame hold a fierce dominion.

Know thou that nature fashioned this fire

Subtler than fires all other, with minute

And dartling bodies,- a fire 'gainst which there's naught

Can in the least hold out: the thunderbolt,

The mighty, passes through the hedging walls

Of houses, like to voices or a shout,-

Through stones, through bronze it passes, and it melts

Upon the instant bronze and gold; and makes,

Likewise, the wines sudden to vanish forth,

The wine-jars intact,- because, ye see,

Its heat arriving renders loose and porous

Readily all the wine- jar's earthen sides,

And winding its way within, it scattereth

The elements primordial of the wine

With speedy dissolution- process which

Even in an age the fiery steam of sun

Could not accomplish, however puissant he

With his hot coruscations: so much more

Agile and overpowering is this force.

. . . . . .

Now in what manner engendered are these things,

How fashioned of such impetuous strength

As to cleave towers asunder, and houses all

To overtopple, and to wrench apart

Timbers and beams, and heroes' monuments

To pile in ruins and upheave amain,

And to take breath forever out of men,

And to o'erthrow the cattle everywhere,-

Yes, by what force the lightnings do all this,

All this and more, I will unfold to thee,

Nor longer keep thee in mere promises.

The bolts of thunder, then, must be conceived

As all begotten in those crasser clouds

Up-piled aloft; for, from the sky serene

And from the clouds of lighter density,

None are sent forth forever. That 'tis so

Beyond a doubt, fact plain to sense declares:

To wit, at such a time the densed clouds

So mass themselves through all the upper air

That we might think that round about all murk

Had parted forth from Acheron and filled

The mighty vaults of sky- so grievously,

As gathers thus the storm-clouds' gruesome might,

Do faces of black horror hang on high-

When tempest begins its thunderbolts to forge.

Besides, full often also out at sea

A blackest thunderhead, like cataract

Of pitch hurled down from heaven, and far away

Bulging with murkiness, down on the waves

Falls with vast uproar, and draws on amain

The darkling tempests big with thunderbolts

And hurricanes, itself the while so crammed

Tremendously with fires and winds, that even

Back on the lands the people shudder round

And seek for cover. Therefore, as I said,

The storm must be conceived as o'er our head

Towering most high; for never would the clouds

O'erwhelm the lands with such a massy dark,

Unless up-builded heap on lofty heap,

To shut the round sun off. Nor could the clouds,

As on they come, engulf with rain so vast

As thus to make the rivers overflow

And fields to float, if ether were not thus

Furnished with lofty-piled clouds. Lo, then,

Here be all things fulfilled with winds and fires-

Hence the long lightnings and the thunders loud.

For, verily, I've taught thee even now

How cavernous clouds hold seeds innumerable

Of fiery exhalations, and they must

From off the sunbeams and the heat of these

Take many still. And so, when that same wind

(Which, haply, into one region of the sky

Collects those clouds) hath pressed from out the same

The many fiery seeds, and with that fire

Hath at the same time inter-mixed itself,

O then and there that wind, a whirlwind now,

Deep in the belly of the cloud spins round

In narrow confines, and sharpens there inside

In glowing furnaces the thunderbolt.

For in a two-fold manner is that wind

Enkindled all: it trembles into heat

Both by its own velocity and by

Repeated touch of fire. Thereafter, when

The energy of wind is heated through

And the fierce impulse of the fire hath sped

Deeply within, O then the thunderbolt,

Now ripened, so to say, doth suddenly

Splinter the cloud, and the aroused flash

Leaps onward, lumining with forky light

All places round. And followeth anon

A clap so heavy that the skiey vaults,

As if asunder burst, seem from on high