Nearly every man who develops an idea works it up to the point where it looks impossible, and then he gets discouraged. That's not the place to become discouraged. - Thomas A. Edison

Our greatest weakness lies in giving up. The most certain way to succeed is always to try just one more time. - Thomas A. Edison

Results! Why, man, I have gotten a lot of results. I know several thousand things that won't work. - Thomas A. Edison