Smartyfair
Genius is one percent inspiration, ninety-nine percent perspiration.

In plain words

A tiny bit of brilliance and an enormous amount of hard work.

Where these words come from

How sure this is
90% sureThese words were traced back to where they first appeared. That source is listed below.
What turned up
Harper's Monthly interview, 1932 (Edison also claimed authorship in a 1927 letter). Quote Investigator traces dated print attributions from 1898 (2%/98%, Ladies' Home Journal) evolving to 1%/99% by 1901 (Idaho Daily Statesman) — well-documented lineage, not a misattribution.
Sources checked
  • en.wikiquote.orgChecked using claude-sonnet-5, 20 August 2026
  • quoteinvestigator.comChecked using claude-sonnet-5, 21 August 2026Quote Investigator's dated-citation trace documents genuine period attributions to Edison from 1898, evolving to the modern wording by 1901, plus Edison's own 1932 Harper's Monthly confirmation of authorship.

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