Context for unity, church membership...
Point #1. Does Scripture teach us about membership?
It’s About Commitment
Who’s In and Who’s Out
Point #2. How does church membership promote unity?
No member of the body is independent; each depends in a profound way on all the others. So in the church at Corinth, there were some people gifted to do certain things, and others gifted to do other things. Each “member” in the church was different, yet working together they had everything necessary for the building up of the church body
First and most importantly, church membership defines the group of people with whom we seek unity. Simply stated, church membership unifies because it requires members to be Christians. We unite with people who have repented of sin and trusted in Jesus Christ for salvation.
It is astonishing how often this truth is ignored in churches today. And as you can imagine, this has drastic consequences for church unity. When churches are filled with unregenerate, non-Christian people who hold offices and teaching positions, the result is almost always a church that is full of strife and division. That’s why, when we interview a prospective member of this church, we ask him to tell us how he became a Christian and also to explain briefly the gospel of Jesus Christ.
When a church allows into membership people who do not give evidence of faith in Christ, they are left having to force unity on a group of people who are not indwelt by the life-changing power of the Holy Spirit. Church membership fosters unity because it makes the nature of our task clear. We are to demonstrate the glory of God’s wisdom by uniting in the local church with a specific group of people—those who are fellow believers in Jesus Christ.