Lucretius, De Rerum Natura
William Ellery Leonard, Ed.

     Likewise,
The abounding well-spring of the liquid light,
The ethereal sun, doth flood the heaven o'er
With constant flux of radiance ever new,
And with fresh light supplies the place of light,
Upon the instant. For whatever effulgence
Hath first streamed off, no matter where it falls,
Is lost unto the sun. And this 'tis thine
To know from these examples: soon as clouds
Have first begun to under-pass the sun,
And, as it were, to rend the rays of light
In twain, at once the lower part of them
Is lost entire, and earth is overcast
Where'er the thunderheads are rolled along-
So know thou mayst that things forever need
A fresh replenishment of gleam and glow,
And each effulgence, foremost flashed forth,
Perisheth one by one. Nor otherwise
Can things be seen in sunlight, lest alway
The fountain-head of light supply new light.
Indeed your earthly beacons of the night,
The hanging lampions and the torches, bright
With darting gleams and dense with livid soot,
Do hurry in like manner to supply
With ministering heat new light amain;
Are all alive to quiver with their fires,-
Are so alive, that thus the light ne'er leaves
The spots it shines on, as if rent in twain:
So speedily is its destruction veiled
By the swift birth of flame from all the fires.
Thus, then, we must suppose that sun and moon
And stars dart forth their light from under-births
Ever and ever new, and whatso flames
First rise do perish always one by one-
Lest, haply, thou shouldst think they each endure
Inviolable.