The warfare is ever repeated, though in new forms. In the highest form it is Christ versus the World. And that conflict must be fought out in our own souls first. Our religion should lead not only to accept and rely on what Christ does for us, but to do and dare for Christ. He has given Himself for us, and has thereby won the right to recruit us as His soldiers. We have to fight against ourselves to establish His reign over ourselves.
And then we have to give our personal service in the great battle for right and truth, for establishing the kingdom of heaven on earth. There come national crises when every man must take up arms, but in Christ's kingdom that is a permanent obligation. There the nation is the army. Each subject is not only His servant but His soldier. The metaphor is well worn, but it carries everlasting truth, and to take it seriously to heart would revolutionize our lives.
