Fear is natural instinct necessary for self protection. Primary fear is of risk to life and body injury. That is why all animals escape from dangerous animals and are scared of storms, quake and other disasters. Then there is fear of losing money, fame, friends, beloved etc. The more you have, more the fear.
Fear is a natural instinct and has nothing to do with negative thinking or positive thinking and one has to conquer it by building a postive mindset not to yield to it!
Fear may arise from unawareness, misconception, insecurity etc and has a deep impact in our overall lives. If a child is raised from childhood to be fearful then throughout his or her life this fearful nature will be there and it will have a deep influence in his or her life....