Genius is 1 percent inspiration, 99 percent perspiration.

I'll try anything...I'll even try Limburger cheese!

Of the 200 light bulbs that didn't work, every failure told me something that I was able to incorporate into the next attempt.

There is time for everything.

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.

Mr. Edison worked endlessly on a problem, using the method of elimination. If a person asked him if he were discouraged because so many attempts proved unavailing, he would say, "No, I am not discouraged, because every wrong attempt discarded is another step forward.".

The body is a community made up of its innumerable cells or inhabitants.