The New Testament shows us that there is a difference between being a member and being a Christian. Being a Christian is something individualistic, whereas being a member is something corporate....The Body of Christ is not a doctrine; it is a realm. It is not a teaching, but a life. Many Christians seek to teach the truth of the Body, but few know the life of the Body. The Body of Christ is an experience in a totally different realm... Only a revelation from God will usher us into the realm of the Body, and only then will the Body of Christ become our experience.  (The Mystery of Christ by Watchman Nee)