Our greatest weakness lies in giving up. The most certain way to succeed is always to try just one more time.

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

I would construct and work along various lines until I found them untenable. When one theory was discarded, I developed another at once. I realized very early that this was the only possible way for me to work out all the problems.

Interest is the invention of Satan.

We are striking it big in the electric light, better than my vivid imagination first conceived. Where this thing is going to stop Lord only knows.

The injurious agent in cigarettes comes principally from the burning paper wrapper. The substance thereby formed is called "acrolein." It has a violent action on the nerve centers, producing degeneration of the cells of the brain, which is quite rapid among boys. Unlike most narcotics, this degeneration is permanent and uncontrollable. I employ no person who smokes cigarettes.

Any large extension of the Government into business affairs - no matter what the pretense and no matter how the the extension is labeled - will be bound to promote waste and put a curb on our prosperity and progress.