Ovid (43 BCE-17 CE)
“Think how a tract of the sky, when the sun breaks suddenly through
at the end of a rain shower, is steeped in the long, great curve of a rainbow;
the bow is agleam with a range of a thousand various hues,
but the eye cannot tell where one fades into another; adjacent
tones are so much the same, though the difference is clear at the edges.”
- From the poem, Metamorphoses, by Ovid (Book 6, approximately lines 63-67). Translated by David Raeburn. Penguin Classics; Revised Edition, 2004.