These people will either strive to be in situations where they are guaranteed success, or where they are assured of failure. In both cases there is no possibility of positively evaluating their failure. I believe the concept of failure and success has been over emphasized in our society, by everything from the media, to sport, to recognition at school for excellent performances. The point that is pushed is that success is desired and failure is seen as a sign of weakness. I would disagree.
Failure can be an important catalyst to success.
One only has to look at any successful person and they will have a story about how they have at some stage of their life failed. This concept is highlighted in a recent Michael Jordan commercial, in which he describes all the failures he has had, which have lead to his success. Pick yourself up, learn from the errors, and use them to firmly step up to your next level, improving future performances. Remember there will always be another show.