Every Christian is a member of the body of Christ. Local church membership is the public acknowledgment of this spiritual reality. As followers of Christ, we are “members of the household of God” (Ephesians 2:19), and it is our responsibility to be the Church as a member of His body. As each member plays their part, God uses us to build His body by His Spirit.
Romans 12:4-5 For as in one body we have many members, and the members do not all have the same function, so we, though many, are one body in Christ, and individually members one of another.
Review the Membership Covenant for more info: