It was happening spontaneously. Verse 47 says that it was the Lord who was adding to their number. The church has gotten away from this. We have programs and plans to try to get people into the church. And then we wonder why they are so ineffective.
Outsiders look at the church and they can tell the phony from the true.
And when they see the phoniness, they want no part of it. But I AM saying that such will be eventually found to be ineffective if there is no reality within the church.