When there's no experimenting there's no progress. Stop experimenting and you go backward. If anything goes wrong, experiment until you get to the very bottom of the trouble.

The thing I lose patience with the most is the clock. Its hands move too fast

The memory of my mother will always be a blessing to me.

I make more mistakes than anyone else I know, and sooner or later, I patent most of them.

The man who doesn’t make up his mind to cultivate the habit of thinking misses the greatest pleasure in life.

I do not believe any type of religion should ever be introduced into the public schools of the United States.

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.