Great churches are built by Christ! He did say, "I will build my church!" But, the evidence is also overwhelming that people have a role! God's children, filled with the Spirit of God, love the work of God - the work of the Kingdom! God supernaturally gives an increase - but He uses people in the process of getting it done!
Hence, great churches are Christ honoring and Bible believing! And the people in great churches "show up" for the mission - the ministry that takes place among people!
In good to not so good churches - showing up is not so important - actually - showing up is considered optional. In great churches - people seldom if ever miss the opportunity to be participants in carrying the Gospel to their communities and beyond!
As far as the "people" ingredient is involved in church growth - great churches are built on those who show up - not those who never take the field!!!