They might be afraid of looking bad or being embarrassed. I realized that if I was going to achieve anything in life I had to be aggressive. I had to get out there and go for it. I don't believe you can achieve anything by being passive. I'm not thinking about anything except what I'm trying to accomplish.
Any fear is an illusion.
You think something is standing in your way but nothing is really there. What is there is an opportunity to do your best and gain some success. If it turns out my best isn't good enough, then at least I'll never be able to look back and say I was too afraid to try. Failure always made me try harder the next time. Sometimes failure actually just gets you closer to where you want to be.