The age of chivalry is past. Bores have succeeded to dragons.
—Charles Dickens

It served writers well in the age of chivalry, when they strove to remind their rich and powerful readers (the only kind; everyone else was illiterate) that the best things in life came not from titles and trappings, but hard work and a positive attitude.
Geoffroi de Charny asked every reader to "be a man of worth;" Geoffery Chaucer, to "make a virtue of necessity."
When you worked hard and maintained an "attitude of gratitude," sudden setbacks (the "necessity" in Chaucer's phrase) wouldn't throw you.
Alas, chivalry's dead; not so, reversals of fate.
Riding the Wheel of Fortune is still dangerous.