1. Action reduces fear because fear is a psychological state of mind. So when you take action despite that fear, your mind is literally short-circuiting the fear saying "I don't care I'll do it anyway" and that itself gives you something to look forward and literally shifts your mind away from the fear because you're actually busy in the action to overcome it. You still feel fearful in your body - maybe your heart rate increases, you get sweaty, your stomach feels weird, but your mind is still set on an action. And once you complete that action, and the more you practice/repeat it, you tell your nervous system "it's ok, relax, there's nothing to be afraid of." That's when you build confidence, your mind and body both relax, and you overcome fear