When you feel you can't, you design behaviors to prove you can't. All behavior is consistent with your emotional beliefs. All emotional beliefs are the result of the emotional tapes you are playing. The mind is a very positive organism designed to always see the solution to all that your life is handed. They live through their emotions.
Information enters a life through two pathways.
One is your emotions. When information enters through your emotions, it has to filter through all the old negative tapes you have made about all the journeys you have not completed. That means the information has to pass through all your worries, your doubts, your fears. It takes it from a possibility to a problem. When life is defined by the emotional tapes that come from all the issues you haven't completed, it feeds all your negative fears.