https://www.mljtrust.org/sermons-online/ephesians-2-20-22/fitly-framed-together/

What is the most important part of a building? Some may think the walls or the floor, but it is always the foundation. In the church, it is no different. In this sermon on Ephesians 2:20–22 titled “Fitly Framed Together,” Dr. Martyn Lloyd-Jones continues teaching a further understanding of the nature of the church and the application that truth has for the Christian. Previously, Dr. Lloyd-Jones expounded on the importance of the foundation (apostles, prophets, and Christ being the cornerstone), but he turns to the stones being placed on the foundation—the church. First, each stone must be “truly and rightly related to that foundation” and to each other. Each stone (or church member) is different, but is still inseparably tied to the rest of the building. Also, each stone must be connected to the foundation. Ultimately God is the builder, but as Dr. Lloyd-Jones notes, God uses pastors (1 Cor 3:10-15). Dr. Lloyd-Jones issues a warning for pastors that they are careful what they build the church with. Ploys can be used to build big churches, but only those who have a “vital union” with the foundation—Jesus—will last. God is building His church to be “harmoniously fitted together” with true believers of every type of person.