No, I haven't failed thousands of times. On the contrary, I have successfully eliminated thousands of ideas that do not work!

Restlessness is discontent and discontent is the first necessity of progress. Show me a thoroughly satisfied man and I will show you a failure.

I was relentless, even in the face of total lack of encouragement, because much more often than you'd think, sheer persistence is the difference between success and failure.

You must first be willing to fail - and you must have the courage to go for it anyway.

Success is not final, failure is not fatal: it is the courage to continue that counts.

We've got to get rid of the fear of failure in this country. In America, people start things, fail and shake themselves down and start things again. The animal spirit of capitalism is stronger there.