The longer an article is in the process of manufacture and the more it is moved about, the greater its ultimate cost.

Thinking is hard work. That's why there are so few people doing it.

If there is one thing I would banish from earth, it is fear. And the only way to do that is to see that there is nothing to fear - nothing in all of life to be afraid of.

I cannot discover that anyone knows enough to say definitely what is and what is not possible.

When I can't handle events, I let them handle themselves.

If I'd listened to customers, I'd have given them a faster horse.

I am in exact accord with the belief of Thomas Edison that spirit is immortal, that there is a continuing center of character in each personality. But I don't know what spirit is, nor matter either. I suspect they are forms of the same thing. I never could see anything in this reputed antagonism between spirit and matter. To me this is the most beautiful, the most satisfactory from a scientific standpoint, the most logical theory of life.