I stand up for what I believe in and a lot of the time that can be against people's opinions.
When you believe in yourself almost anything is possible, and you are confident in your skills and abilities. Some of the most important people through history were extremely successful because they believed in themselves and they followed their dreams. If you believe in yourself then negative comments or actions can not take away this sense of self worth, and you will not listen to the naysayers who try to bring you down to their level.