How often do you think about mistakes you make in your job?
As an exercise, it may be worthwhile taking the time to itemize a top five list of mistakes you have made in your career. By focusing on what you did wrong, you will realize your limits, and you likely will also realize something else — your ability to recover from those mistakes!
Those who succeed in their careers are those who are willing to apply a critical eye to themselves. There will be things to criticize. But there will also be things to praise. And there should be comfort in that discovery.