I just read a quote by C.H. Spurgeon on church growth that I felt was worth sharing.
The only multiplication of the Church of God that is to be desired is that which God sends: “Thou hast multiplied the nation.” If we add to our churches by becoming worldly, by taking in persons who have never been born again; if we add to our churches by accommodating the life of the Christian to the life of the worldling, our increase is worth nothing at all; it is a loss rather than a gain. If we add to our churches by excitement, by making appeals to the passions, rather than by explaining truth to the understanding; if we add to our churches otherwise than by the power of the Spirit of God making men new creatures in Christ Jesus, the increase is of no worth whatever. – C.H.S