The world is divided into two categories: failures and unknowns.

I have probably purchased fifty 'hot tips' in my career, maybe even more. When I put them all together, I know I am a net loser.

Notice the difference between what happens when a man says to himself, I have failed three times, and what happens when he says, I am a failure.

Failure is a word that I simply don't accept.

The most important of my discoveries have been suggested to me by my failures.