It is a self defense mechanism for the brain to try it's best to STOP you from achieving something you are afraid of. Maybe you were told you couldn't and you are worried they were right. Maybe you were told your dreams were foolish, and you are second guessing yourself. Maybe you have experienced the heart break of believing in something and then having it taken away.
Only YOU can BREAK FREE from this pattern. Only YOU can CHOOSE to change your mindset and SUCCEED. No matter how old you are, your brain can LEARN a new way... you can get conditioned to SUCCEED.
The very first thing you need to do is leave the past in the past. Silence the voices that said you couldn't. The next thing you need to do is stay away from negative people in your life, and learn to not let them matter. And finally, you need to BELIEVE, you need to have PURE FAITH that you DESERVE for all your dreams to come true, and you NEVER GIVE UP until you get there!!! Decide, Commit, Succeed!!!