Lance describes himself as brash during the early phases of his cycling career. How does this brashness interfere with his progress?

Lance feels that as a young athlete, he has a tendency to be brash, thinking that he often knows better than others. This results in him failing to listen to good advice from coaches, including the suggestion to pace himself. Lance often starts out too fast and loses steam along the way, causing him to lose races. It takes him a while to start listening to his coaches and get better results.