The only time you don't want to fail is the last time you try.

An inventor fails 999 times, and if he succeeds once, he's in. He treats his failures simply as practice shots.

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.

High achievement always takes place in the framework of high expectation.

Thinking is one thing no one has ever been able to tax.

Believe and act as if it were impossible to fail.