The problem is not that you’re not smart. You’re smart, more than smart – you have the potential to be brilliant.
You could be brilliant, but there are no brilliant cowards.
Half of brilliance is courage (recognizing when you have to be brave and acting upon it), without it you are not.
Stop cowering, stop going into that fetal position of yours, stop making excuse as to why you can’t – go do something that scares you to death.