From Ephesians 4:1-7 this article discusses the oneness or the unity of the church. The visible and invisible church is also mentioned. Other factors in church unity, like truth, humility, patience and gentleness is also discussed.
This article starts of by looking at visible and invisible church. It then continues by looking at church membership. The author then concludes by discussing which children are allowed to receive baptism: the children of any parent, or only the children of believers? Is infant baptism also for the ungodly or only for the children of believers?