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.

If I want to stop a research program I can always do it by getting a few experts to sit in on the subject, because they know right away that it was a fool thing to try in the first place.

The Wright brothers flew right through the smoke screen of impossibility.

All human development, no matter what form it takes, must be outside the rules; otherwise we would never have anything new.

Failures, repeated failures, are sign-posts on the road to achievement. The only time you don't want to fail is the last time you try something (and it works).

We need to teach the highly educated man that it is not a disgrace to fail and that he must analyze every failure to find its cause. He must learn how to fail intelligently, for failing is one of the greatest arts in the world.

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