Churches, like all other institutions, spend a lot of time and effort thinking about how they can grow. I can’t think of a single instance in scripture where the growth of one particular congregation was the goal. Luke talks a lot about numbers especially in the first few chapters of Acts, but all of that was kingdom growth as God initiated a scattering of the church into the world. From those first chapters on, we read about gospel growth. In Acts 12:24, Luke juxtaposes God’s judgement on the empire-building pride of Herod with God’s blessing on the gospel message with the words, “But the word of God continued to spread and flourish.”
In my experience, megachurch can often look more like Herod’s speech to the Caesareans than the apostle’s God empowered ministry of the gospel message. Our concern should always be with how the word of God is spreading and flourishing rather than on how many people liked the oration on a Sunday morning.