Nietzsche isn't simply saying that hardship builds character—he's making a sharper claim about *selection*. He means that surviving difficulty doesn't just add resilience to who you already are; it actually eliminates your weaker self, leaving only what's capable of enduring. When a parent returns to school after a decade away, for instance, they don't just gain confidence—they've shed the version of themselves that made excuses, and what remains is someone fundamentally altered by the sorting process itself. The dark insight here is that growth isn't additive; it's subtraction through fire.