Do not concern yourself with what others have. Do not set your expectations based on the achievements of others. You will never reach your full potential by doing that. You can only reach your full potential through your desire to achieve greatness, to be better today then your were yesterday. Always look inward not outward for your motivation. Looking outward does not fortify your self esteem against failure. Any setback you encounter may deter you from continuing. Look inward and at times of adversity you find the inner strength and desire to be great. These traits will propel you to keep you moving forward until you reach your goal.