These three articles looks at the importance and the responsibilities of church membership. The author also discusses the invisible church, membership of a denomination, the important place of truth in the church, and separation and apostasy from a church.

This article is about the one church of Jesus Christ and church unity. The author also discusses the distinction between the invisible church and the visible church.

This article is about the church and election. The author looks at the visible church and invisible church distinction, the relation of church and faith/believers, and church membership. Jesus Christ and the church is also discussed.