Never be discouraged, because every wrong turn attempt, when left behind you, is another step forward taking you closer to your goals.

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.".

My mother was the making of me.

The United States, and other advanced nations, will someday be able to produce instruments of death so terrible the world will be in abject terror of itself and its ability to end civilization.... Such war-making weapons should be developed - but only for purposes of discovery and experimentation

One might think that the money value of an invention constitutes its reward to the man who loves his work. But... I continue to find my greatest pleasure, and so my reward, in the work that precedes what the world calls success.

I have not failed. I have successfully discovered 1200 ideas that don't work.

The first requisite of success is the ability to apply your physical and mental energies to one problem without growing weary.