Failure comes from ego, greed, envy, fear, imitation. I have success not because I am smart, but because I am rational.

Leaders, true leaders, take responsibility for the success of the team and understand that they must also take responsibility for the 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.

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

It's fine to celebrate success, but it is more important to heed the lessons of failure.

Success is my only option, failure's not.