The real force here isn't that purpose makes suffering bearable—that's what most people assume—but rather that a sufficiently *clear* why actually rewires how you perceive the how itself. When a parent works three jobs, they're not grimly tolerating hardship; they've transformed the exhaustion into something legible and therefore bearable in a way that random suffering never is. Nietzsche's precision matters because he doesn't promise comfort, only *endurance*, which is the honest thing to offer.