The Charger and the Miller

A CHARGER, feeling the infirmities of age, was sent to work in a mill
instead of going out to battle. But when he was compelled to grind
instead of serving in the wars, he bewailed his change of fortune and
called to mind his former state, saying, “Ah! Miller, I had indeed to
go campaigning before, but I was barbed from counter to tail, and a man
went along to groom me; and now I cannot understand what ailed me to
prefer the mill before the battle.” “Forbear,” said the Miller to him,
“harping on what was of yore, for it is the common lot of mortals to
sustain the ups and downs of fortune.”