One of the critical skills for ongoing success is the ability to bounce back from adversity. Sooner or later in life everyone experiences failure, disappointment, setbacks or loses the desire to keep on keeping on.
Just because you have failed doesn't mean you are a failure. Just because you have achieved success doesn't make you a success. Many people have hit bottom, only to climb out and achieve greatness; many people have done great things only to end up broke, alone, and without any lasting feeling of accomplishment.