Churchill understood something most motivational platitudes miss: that enthusiasm isn't a reward you earn after success, but rather the *fuel that gets spent* during the messy middle. Notice he doesn't say "with renewed enthusiasm" or "learning from each stumble"—he says "no loss," which suggests enthusiasm is a finite resource that most people hemorrhage away through disappointment. When a novelist receives her tenth rejection letter, the difference between those who eventually publish and those who quit isn't talent; it's whether she can keep that initial fire burning despite mounting evidence it might never work. That's the specific torment Churchill is naming—not the failures themselves, but the entropy of hope.