People are not remembered by how few times they fail, but by how often they succeed. Every wrong step is another step forward

Sleep is like a drug. Take too much at a time and it makes you dopey. You lose time and opportunities.

I believe that the motion picture is destined to revolutionize our educational system and that in a few years it will supplant largely, if not entirely, the use of textbooks.

I will not say I failed 1000 times, I will say that I discovered there are 1000 ways that can cause failure

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

I've never made a mistake. I've only learned from experience.

The inventor tries to meet the demand of a crazy civilization.