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

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

If I had not had so much ambition and not tried to do so many things, I probably would have been happier, but less useful.

There is great value in disaster. All our mistakes are burned up. Thank God we can start a new.

Invention is 1% inspiration and 99% perspiration

Until man duplicates a blade of grass, nature can laugh at his so-called scientific knowledge. Remedies from chemicals will never stand in favor compared with the products of nature, the living cell of the plant, the final result of the rays of the sun, the mother of all life.

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.