Why? Because the secret weapon against fear is your focus. Specifically, focusing on the present moment. The power question to ask is: "What can I do, in this exact moment, to combat this fear?" (The other reason you should focus on the present moment? Fear comes from focusing on the future - when you focus on the present, you're safe.)
Challenge yourself to face at least one fear this week. You don't necessarily have to conquer it or completely overcome it - but you do need to face it with focus!