Renown author John C. Maxwell says, "I have never seen anyone that’s been able to consistently rise above their self-image." In other words, you won't be able to more than you think you can do and you won't be able to be more than you believe you can be. I know we've discussed limiting beliefs before and yet, it is what will definitely determine your actions. "You must see value in yourself in order to add value to yourself." (Maxwell)
People that have a diminished view of themselves will often sabotage their own success. Have you ever known someone that could do better yet still goes back to the same mess, the same person, continues the same destructive habits, or keeps repeating the same patterns of pain and failure?
You won't ever grow if you don't think you can grow. You just won't.