Invention is 10% inspiration and 90% perspiration.

To those searching for truth -- not the truth of dogma and darkness but the truth brought by reason, search, examination, and inquiry, discipline is required. For faith, as well intentioned as it may be, must be built on facts, not fiction -- faith in fiction is a damnable false hope.

Continued innovation is the best way to beat the competition.

There cannot be overproduction of anything which men and women want. And their wants are unlimited, except by the size of their stomachs.

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.".

Negative results are just what I want. They’re just as valuable to me as positive results. I can never find the thing that does the job best until I find the ones that don’t.

Just because something doesn't do what you planned it to do doesn't mean it's useless.