The Horse and the Ass

The authors of which are not known
A Steed, swelling with pride beneath his trappings, met an Ass, and because the latter, wearied with his load, made room very slowly: “Hardly,” said the Horse, “can I restrain myself from kicking you severely.” The Ass held his peace, only appealing with his groans to the Gods. The Horse in a short space of time, broken-winded with running, is sent to the farm. There the Ass espying him laden with dung, thus jeered him: “Where are your former trappings, vain boaster, who have now fallen into the misery which you treated with such contempt?”
Let not the fortunate man, unmindful of the uncertainty of fortune, despise the lowly one, seeing that he knows not what he may come to himself.