Lucretius, De Rerum Natura
William Ellery Leonard, Ed.

Well learn from this: mainly, because we see
Even 'mongst visible objects many be
That send forth bodies, loosely some diffused-
Like smoke from oaken logs and heat from fires-
And some more interwoven and condensed-
As when the locusts in the summertime
Put off their glossy tunics, or when calves
At birth drop membranes from their body's surface,
Or when, again, the slippery serpent doffs
Its vestments 'mongst the thorns- for oft we see
The breres augmented with their flying spoils:
Since such takes place, 'tis likewise certain too
That tenuous images from things are sent,
From off the utmost outside of the things.
For why those kinds should drop and part from things,
Rather than others tenuous and thin,
No power has man to open mouth to tell;
Especially, since on outsides of things
Are bodies many and minute which could,
In the same order which they had before,
And with the figure of their form preserved,
Be thrown abroad, and much more swiftly too,
Being less subject to impediments,
As few in number and placed along the front.
For truly many things we see discharge
Their stuff at large, not only from their cores
Deep-set within, as we have said above,
But from their surfaces at times no less-
Their very colours too. And commonly
The awnings, saffron, red and dusky blue,
Stretched overhead in mighty theatres,
Upon their poles and cross-beams fluttering,
Have such an action quite; for there they dye
And make to undulate with their every hue
The circled throng below, and all the stage,
And rich attire in the patrician seats.
And ever the more the theatre's dark walls
Around them shut, the more all things within
Laugh in the bright suffusion of strange glints,
The daylight being withdrawn. And therefore, since
The canvas hangings thus discharge their dye
From off their surface, things in general must
Likewise their tenuous effigies discharge,
Because in either case they are off-thrown
From off the surface. So there are indeed
Such certain prints and vestiges of forms
Which flit around, of subtlest texture made,
Invisible, when separate, each and one.