Have you ever had a stupid belief? We all have! I remember that I said that I'm going to eat only fast food because it was cheap and it was fast. And I could spend my time doing other things that are more important than coking. well, you might know what happened :D I didn't have any energy and concentration. Belief is like a table it has a top and legs. Now the top is your belief ( like your stupid) and legs are the whys ( because you didn't do well in school). The more legs that it has (more whys) the stronger is that table. So change your beliefs whit why is that not true. Find beliefs that can serve you and find why is that true and find beliefs that are not serving you and find why are they not true.