Mistakes happen, it’s a part of life.  The goal is to not achieve perfection, that is impossible and sets you up for failure.  Rather, what sets you apart and is your defining moment is how you deal with mistakes.  There will always be things outside of your control.  However you do have control over your reaction.  You can control how you respond to a situation.  Cleaning up your mistakes is part of your growth process and that is where the real learning takes place.