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 aything 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. Failure always made me try harder the next time.