Whoever said "Quitters never win and winners never quit," most likely was never in an abusive relationship or had a terrible boss.
When I finished Carlyle's 'French Revolution' in 1871, I was a Girondin; every time I have read it since, I have read it differently—being influenced and changed, little by little, by life and environment (and Taine and St. Simon): and now I lay the book down once more, and recognize that I am a Sansculotte! And not a pale, characterless Sansculotte, but a Marat. Carlyle teaches no such gospel; so the change is in me — in my vision of the evidence.
Mark Twain, letter to William Dean Howells, August 22, 1887. The Girondins were a moderate faction, mostly bourgeois; the Sansculottes were radicals, mostly working-class. Hippolyte Taine and the Comte de Saint-Simon were French philosophes.