Now, then, of air
I'll speak, which hour by hour in all its body
Is changed innumerably. For whatso'er
Streams up in dust or vapour off of things,
The same is all and always borne along
Into the mighty ocean of the air;
And did not air in turn restore to things
Bodies, and thus recruit them as they stream,
All things by this time had resolved been
And changed into air. Therefore it never
Ceases to be engendered off of things
And to return to things, since verily
In constant flux do all things stream.
Lucretius. De Rerum Natura. William Ellery Leonard. E. P. Dutton. 1916.
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