Show me a church where people want to reach out and impact the culture around them, where people want to live godly lives, and I will show you a church that can expect satanic opposition.
In the book of Acts, we see the early church being attacked through persecution (see Acts 4). We see the enemy trying to infiltrate the church through compromise (see Acts 5). And then we see the devil using one of his most effective tactics against the church: division (see Acts 6).
A disagreement arose in the early church about how the widows were being treated. There was a feeling that partiality was being shown to one group over another.
During the days of Alexander the Great, the Greek culture and philosophy had permeated the world. Many of the Jews had adopted Grecian ways, and they were known as Grecians, or Hellenists. Unlike the native Hebrews, they spoke Greek. But there were other Jews, called Hebrews, who stayed true to the old ways. They were critical of the Grecian believers and thought of them as second-class Jews.
The Grecians felt their widows were getting less attention than those who were raised in the Jewish culture. And it caused a division in the church.
Probably more havoc has been wreaked on the church through division than anything else. And when you get down to it, many of the divisions in a church are actually over minor things. People will get bent out of shape over things that really don't matter.
You can always find something wrong with a church. No church is perfect. So here is a good adage to remember: In essentials, unity; in nonessentials, liberty; in all things charity. Because one of the devil's most effective ploys is causing division among believers.