Do not let your ego be so strong, that you feel you know it all. Infact, we can never know it all, there is far too much knowledge in the world to know it all.
All we can know is that we must continue to grow everyday for as long as we live. Always, be humble and wise. Wise in understanding you have still so much to learn. Humble in learning and growing. Then, you become a beautiful, characterful human being. And, that is what I think our life is all about. Would you agree?