I have heard stories about pastors who created huge waves just by preaching the Gospel. They didn't preach the Gosel out in the "wicked world", but they preached it in their own congregations. I'm working on John chapter 6 as part of a Bible class I'm leading. At the end of it, many of Jesus' disciples -- Jesus' congregation -- are disgusted by His teaching about Him being the bread of life, and they leave Him. Jesus said that this happened because most of them didn't believe in Him -- even though they are called "disciples."
Jack is the teaching elder of Ironworks Pike Community Church. He is a graduate of Columbia Biblical Seminary http://www.ciu.edu.