Epub version. Dare to face an uncompromising look at the real need in modern western Christianity. Does a church's strength come from a stage, or from its members? In this training manual for church leaders, McCallum discusses something far more important for local churches than methods, structures, or gimmicks: "ethos." If you can build a biblical ethos into your group they will be ready to handle any obstacle and continue to thrive, regardless of your church model.