Schweitzer isn't simply saying that hardship builds character—he's identifying something more particular: the strength forged in struggle is categorically different from inherited advantage or passive circumstance. A person who has only known comfort possesses no experiential map for the terrain of genuine adversity, whereas someone who has battled through real obstacles develops an almost muscular understanding of how to persist. Consider the difference between a surgeon trained in a well-equipped hospital versus one who learned medicine in a remote clinic with limited supplies—both are competent, but only the latter possesses the adaptive ingenuity required when everything goes wrong. This is why survival matters less than *how* we survive.