Success is stumbling from failure to failure with no loss of enthusiasm.

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

Success depends upon previous preparation, and without such preparation, there is sure to be failure.

You become strong by defying defeat and by turning loss and failure into success.

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.

Great success always comes at the risk of enormous failure.