It doesn't matter if you try and try and try again, and fail. It does matter if you try and fail, and fail to try again.

Do not bring me your successes; they weaken me. Bring me your problems; they strengthen me.

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

Our imagination is the only limit to what we can hope to have in the future.

The world hates change, yet it is the only thing that has brought progress.

We have a lot of people revolutionizing the world because they've never had to present a working model.

Action without intelligence is a form of insanity, but intelligence without action is the greatest form of stupidity in the world.