Church membership is very different than membership in a secular organization. In a secular organization, members come and go. For instance, if a member leaves the rotary club, credit union, sports team, etc., there is minimal impact on the remaining members. They will still continue on and go about their business. With the church, we speak of membership like a body. If you lost a body part, you would experience deep pain and disability to every other part. Every member is a part of the body and is vital to the well-being and growth of all other members.