Its alright if you feel so, Yes we might have limitations doesn't mean that we can't do things which are so called impossible these days right? If you always believe that our potential to do great is limited you will never get to see its true colors. Think about every discovery and every invention ever made. All of these were literally impossible before someone achieved it and proved to the rest of the world that they were right.
Our mind is complex, so is life and so is everything linked to it. It might hard now to see whats ahead but I can guarantee you that its all possible over time.

Have a great day man! :)