From an article posted in the Costco Connection by Andrew Lock on "Don't Give UP".
"…teachers said he was 'too stupid to learn anything.' he was fired from his first two jobs for being 'nonproductive.' As an inventor, Edison made more than 1,000 unsuccessful attempts to invent the light bulb. When a reporter asked him how it felt to fail 1,000 times, Edison said that he didn't fail all those times, but that the light bulb was an invention with 1,000 steps."