I never said that it was impossible to grow from grade 'F' to 'A'. I only said that it will be truly difficult, and in fact impossible for most people, as most people have a low tolerance for stress. It's possible but very difficult. Why not focus on what you're good at and become great at it. That's something more realistic and achievable. The tendency of becoming exceptional at something you're very bad at is really slim. Thanks for coming around!