Etymology

what doesn't kill you makes you stronger

Today it means: Hardship builds moral character. Full definition →

German Was mich nicht umbringt, macht mich stärker
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The story

  1. German · derived fromWas mich nicht umbringt, macht mich stärker
  2. English todaywhat doesn't kill you makes you stronger

From German Was mich nicht umbringt, macht mich stärker, which has been variously translated, from Friedrich Nietzsche's Twilight of the Idols.

Etymology from Wiktionary, CC BY-SA 4.0.