The infection of the world is never far away. Where truth is, falsehood ever attacks. There was a constant warfare ahead to keep the faith intact and the Church pure. Through all this scene runs the dominant feeling of an affection as deep as the heart itself. The most concrete, lasting form of ministry in Acts is church planting.
Planting churches is more than establishing a meeting place or baptizing a group of believers.
Only when leaders are properly functioning can members take the time to participate actively in outreach. Then the church will grow, and as it grows, it will truly become planted. This requires leadership training. This short record suggests that Paul had no intention of making a career of nurturing those new churches, even though they would have liked him to stay. However, Paul and Silas kept their visits brief and moved on to the frontiers as quickly as possible.