We have a collection of 2 Beauty quotes from Xenophon
"For what the horse does under compulsion, as Simon also observes, is done without understanding; and there is no beauty in it either, any more than if one should whip and spur a dancer." (ID 32149)
"A horse is a thing of beauty... none will tire of looking at him as long as he displays himself in his splendor." (ID 32704)