(…) for behold whenever
The sun’s light and the rays, let in, pour down
Across dark halls of houses: thou wilt see
The many mites in many a manner mixed
Amid a void in the very light of the rays,
And battling on, as in eternal strife,
And in battalions contending without halt,
In meetings, partings, harried up and down.

Titus Lucretius Carus, On the Nature of Things, translated by William Ellery Leonard.