This famous saying is often attributed to Friedrich Nietzsche (from Twilight of the Idols, 1888), though the wording varies in translation. It captures the Stoic-inspired idea that adversity and hardship can forge resilience, wisdom, and inner strength. The quote resonates because it reframes suffering as a potential teacher — not something to be feared, but something that can temper us like steel. Its enduring popularity reflects a universal hope that pain is not pointless, but can lead to growth.