During one of the darkest periods of World War II, after the collapse of France and before America got involved, Winston Churchill wrote that the question in the minds of both friends and foes was this: "Will Britain surrender too?" At the time he made a speech that contained this sentence: "What General Weygand called the Battle of France is over. I expect that the Battle of Britain is about to begin. Upon this battle depends the survival of Christian civilization."

If you are a Christian you, too, are in a battle; and upon this battle depends the joy of your heart, the happiness of your marriage, the welfare of your children, the security of your home, and the influence of your life.

You are involved in spiritual warfare. But the problem is, many Christians, perhaps most, do not even r…