What could be more logical? He who believes in Christ is united with Christ. Faith binds him to Christ. He is a member of Christ’s body, the invisible church. But the visible church is but the outward manifestation of that body. Every member of the invisible church should, as a matter of course, be a member of the visible church. Extremely significant in this connection is Acts 2:47: “And the Lord added to the church daily such as should be saved.” Not only does the Lord Christ require of those who are saved that they unite with the church; He Himself joins them to the church. And the reference is unmistakably to the visible church.
R.B. Kuiper