第51章 BOOK V(7)

Nor need there be for men Astonishment that yonder sun so small Can yet send forth so great a light as fills Oceans and all the lands and sky aflood, And with its fiery exhalations steeps The world at large. For it may be, indeed, That one vast-flowing well-spring of the whole Wide world from here hath opened and out-gushed, And shot its light abroad; because thuswise The elements of fiery exhalations From all the world around together come, And thuswise flow into a bulk so big That from one single fountain-head may stream This heat and light. And seest thou not, indeed, How widely one small water-spring may wet The meadow-lands at times and flood the fields?

'Tis even possible, besides, that heat 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 With the soft down and let from both his cheeks The soft beard fall. And lastly, thunder-bolts, Snow, rains, clouds, winds, at seasons of the year Nowise unfixed, all do come to pass.

For where, even from their old primordial start Causes have ever worked in such a way, And where, even from the world's first origin, Thuswise have things befallen, so even now After a fixed order they come round In sequence also.

Likewise, days may wax Whilst the nights wane, and daylight minished be Whilst nights do take their augmentations, Either because the self-same sun, coursing Under the lands and over in two arcs, A longer and a briefer, doth dispart The coasts of ether and divides in twain His orbit all unequally, and adds, As round he's borne, unto the one half there As much as from the other half he's ta'en, Until he then arrives that sign of heaven Where the year's node renders the shades of night Equal unto the periods of light.