People think of the inventor as a screwball, but no one ever asks the inventor what he thinks of other people.

If a fellow wants to be nobody in the business world, let him neglect sending the mailman to somebody on his behalf.

Every father should remember one day his son will follow his example, not his advice.

Learn how to fail intelligently.

Great steps in human progress are made by things that don't work the way philosophy thought they should. If things always worked the way they should, you could write the history of the world from now on. But they don't, and it is those deviations from the normal that make human progress.

Nothing ever built arose to touch the skies unless some man dreamed that it should, some man believed that it could, and some man willed that it must.

The only time you mustn't fail is the last time you try.