Maybe I don't have what it takes to do it.
Maybe I'm not as good as I think I am.
I am an average guy. I can't make it big.
We all get encountered with such thoughts, once in a while.
Some of us believe in them, some of us don't.
It's A-ok to have such thoughts coming to your mind but it's not to buy them.
Always remember, you become what you see yourself as.
You are what you think you are.