Why does the church need to be confrontational?

Les teaches that Paul often used the Roman soldier as an example, and all the armor and equipment of that soldier was for one direction: forward. There was never room for retreat or a rearguard action; everything Paul denotes was for a frontal attack. He remembers liberals decrying the old hymn "Onward, Christian Soldiers" because it was too militant and too confrontational, and suggests that may be what has happened to the church—it has lost that stance. Yet believers have to be confrontational up to a point, not to be obnoxious, but able to stand against the powers in high places. The feet are shod with the preparation of the gospel, and above all taking the shield of faith. Les warns that today we see a lack of faith and an emphasis on experience, but experience does not exercise faith. We must get doctrinally grounded by our faith, and then work toward experience, not the other way around.