Why is it that so many people are terrified of failure?

Life is a challenge which we cannot run away from. However, we just think about it when we are in trouble. In moments like these we are terrified of failure because we feel a necessity to be perfect. We can never forget the bills, our family, the boring boss... .It is a crazy life. The most important thing is to remember that life has a good side. Being successful at work or in an other activity is important, too, but the fear of failure cannot be bigger than the pleasure of living.