Peter Dietsch gets off to a great start about the importance of ecclesiology to being a Christian:
As you can hopefully tell from the language of the confession, the Westminster Divines had a decidedly high ecclesiology. I’ve found that a good way to test whether or not someone has a high ecclesiology (what they believe about the importance of the visible church) is to ask a question that try to ask of every candidate who comes before presbytery for ordination: “What do you think about this statement: The visible church is the kingdom of the Lord Jesus Christ, the house and family of God, out of which there is no ordinary possibility of salvation.”
This question really strikes at the heart of what one believes about the importance of the visible church, whether or not they have a high ecclesiology. For, as the confession here teaches (and Jesus and the Apostles taught), the visible church is the institution through which God ordinarily confers salvation. The Great Commission to make disciples by baptizing and teaching Christ’s commands is given to the visible church (Matthew 28:18-20), preachers are sent to preach the gospel by the church (10:15), the sacraments are administered in and by the church (Acts 2:41-42; Matthew 28:19; Ephesians 4:4-6, 1 Corinthians 11:17-34), church discipline and the corporate sanctification of God’s people takes place in the church (Matthew 18:15-20; 1 Corinthians 5:1-13; 2 Corinthians 2:5-10).
But then he takes most of it back when he makes the invisible church more important than the visible:
More could be said and I could go on; however, as one who professes to have a high ecclesiology, I wish at this point to say how my high regard for the visible church was arrested and challenged this week. Being a baptized member of the visible church is important, but it of far greater importance that one be a member of the invisible church!
This point was struck home to me with particular impact this week as I’ve been preparing for the sermon this coming Sunday. The text for our sermon is from John 1:19-34. John the Baptist testifies before some Jews who come as a delegation from Jerusalem as to the nature of his ministry – why he is preaching and baptizing. He says that he is voice crying in the wilderness (John 1:23) and that he baptizes in order that Jesus might be manifested (or revealed) to Israel (John 1:31).
And then, in order to clearly delineate between his outward and temporary ministry and the inward and eternal ministry of Jesus, John the Baptist makes the point: I baptize with water, but Jesus who is the Lamb of God who takes away the sin of the world, He baptizes in the Holy Spirit (John 1:33).
Fine, but who is akin to Christ today? The Holy Spirit? But why does God give to the visible church the ordinances other than to connect the visible with the invisible, the Spirit’s call with the word preached?
Unto this catholic visible church Christ hath given the ministry, oracles, and ordinances of God, for the gathering and perfecting of the saints, in this life, to the end of the world: and doth, by his own presence and Spirit, according to his promise, make them effectual thereunto. (WCF 25.3)
Folks who think they are members of the invisible church need the visible church to confirm that thought. Otherwise, they will think that visible church membership is optional and choosing the right one is merely a matter of preference.