“I become what I think about all day long and once you know what you think about, is what expands and you start getting really carefull about what you think, you don’t allow your thoughts to be on anything that you do not want.”
The only problem is that you do not want to try, you do not want to take risk, you make yourself weak by telling your brain continuously some stupid reason as to WHY YOU CAN ACHIEVE SOMETHING?. Stop Doing that right now. Tell yourself everyday that you are the best of all your bests before and you will go on improving yourself every single moment. That there is no end to your willpower. Success may not choose to come closer to you, but you will make things happen according to your imagination.
The time allocated to you is limited, Stop saying I CAN DO IT, Believe in your imaginations because what human brain can perceive, it can surely achieve.