The heart of the church is the Holy Spirit which is why I declare "The church is a spiritual community centered on Jesus and empowered by the Holy Spirit." The second chapter of Acts makes it clear that it was the Holy Spirit who energized and gave life to those men and women gathered in Jerusalem transforming their fear filled and uncertain community into a spiritual power that not only touched the whole world but has continued to do so some 2000 years later. The church is not a static community or institution though it often seems to be headed that way; instead, it is the incarnate presence of Christ in the world.
The Spirit is the heart of that spiritual community. The Spirit birthed the church and it has sustained it through the centuries. Even as our body depends on a beating heart so does the church depend on the heart which gives it life and sustains it. The church cannot function without the Holy Spirit. Certainly, there have been times in its history when it has seemed that the work of the Spirit was forgotten by those who gave leadership to the church.
The church may have great leaders, but none can provide the spiritual energy the spiritual community of the church needs to be the church it was created to be. Anyone who has witnessed the Holy Spirit bursting through the structures of the institutional church knows that it is the Spirit and the Spirit alone which is needed for the life of the community we call the church. Without that holy empowerment the church is no church at all. It is instead a gathering of people who are only making a difference in their own minds.