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

Interest is the invention of Satan.

From his neck down a man is worth a couple of dollars a day, from his neck up he is worth anything that his brain can produce.

I never did anything worth doing by accident, nor did any of my inventions come indirectly through accident, except the phonograph. No, when I have, fully decided that a result is worth getting, I go about it, and make trial after trial, until it comes.

Fools call wise men fools. A wise man never calls any man a fool.

Many of life's failures are people who did not realize how close they were to success when they gave up.

What you are will show in what you do.