Newly graduated from Bible college, I was approached by my new pastor. He explained that their children's church was running about 175 kids, mostly from their successful bus ministry, and would I agree to be in charge?
Over the next several months, several of us visited heavily on the bus routes, and the children's church grew to 300. Then I was suddenly called into the pastor's office, where his enraged wife demanded that she be put in charge. A hateful, untruthful woman, she was the stereotype bad pastor's wife, seizing all the pastoral authority for herself that she could. Galatians 5:18-21 makes clear that people like this have never been born again, but I didn't know that at the time. Although she was doing nothing at all to help the bus ministry or the children's church, she demanded that she replace me.
Three years later, she had the children's church down to 10 kids, and the bus ministry had folded. Other Christian school teachers told me of similar experiences, and they all had one thing in common: whenever a person who THINKS he has a lot of ability steals a ministry from a person without a lot of ability, that ministry declines.