The master mind is a mind that grows or develops out of the harmonious blending of two or more minds. None of the blending minds is the master mind. If three people come together for the purpose of creating a master mind, the master mind can be said to be the fourth mind. Andrew Carnegie, one of the richest men that walked this earth, attributed his success in business to a master mind which was present in his organization. All the 500 men that Napoleon Hill interviewed during his research on the Law of Success agree completely with the truth that no one can achieve any noteworthy success without the help of a master mind. This lesson on the master mind will help you to develop a master mind that will help you to achieve success, whatever success may mean to you.