You can find yourself paralysed into inaction for fear of making mistakes and being taken to task. Sadly, mistakes are one of life's certainties, especially if you decide to live your life to the full and take risks.
When you're afraid of doing something, it's worth asking yourself whether you are stopping yourself from doing something because you're afraid of how someone reacted previously; are you allowing a past experience to affect your present thinking; are you allowing yourself to stay anchored to a past event where you saw yourself as a 'failure' and are reliving negative feelings?