Fear can be defeated because fear is a learned reaction. My coach once told me that we are only born with two fears: the fear of falling and the fear of loud voices. Every other fear we have is learned. In order to defeat fear, all you have to do is manage it. I have read Zig Ziglar on nemerous occassions saying "courage is not the absence of fear but the master of it."

Best way to defeat fear "is to feel the fear and do it anyway".