And then, to name a third of their antagonisms, there was the pervasive power of popular customs and traditions. Every day this little handful of Christians were up against customs that were like invisible bonds. Yes, religious and social customs always thread the common life, and to oppose them is to run up against antagonisms which are like invisible webs of barbed wire. We know what it means to oppose a popular custom to-day. Just oppose even a simple one; decide to wear no black in the hour of bereavement and you are up against a world of hostility and suspicion. And, still further, let the convention you defy be an ecclesiastical convention, or one which has somehow come to wear religious sanctions, and the antagonism is tremendous. Well, this little company of Christians in Ephesus were defying popular social customs and popular religious customs every day, and they were, therefore, confronted with a fierce and terrific opposition. And so they had all these antagonisms to meet, the hardening glare of the world, the far-reaching power of an alien religion, and the tyranny of popular custom and tradition. And in the very thick of all these you must imagine these comparatively youthful Christians seeking to live their separate and consecrated life. But in this strong and tender letter to this little flock of Christians, the apostle Paul looks beyond the opposition of flesh and blood, and the steelly barriers of usage and tradition; he pierces the visible veil and beholds invisible antagonists, spiritual, alive, active and hostile. Listen to him: "For ours is not a conflict with mere flesh and blood, but with the despotisms, the empires, the forces that control and govern this dark world, the spiritual hosts of evil arrayed against us in the heavenly warfare." When the apostle looked upon Ephesus it seemed as though the whole city became transparent, and behind the visible and transient veils he saw these spiritual foes. There was much mischief in Ephesus, there was much weaving of evil webs, there was much coming and going of worldly forces; but to Paul, the real prompters and instigators were back in the unseen. This is the teaching of this great apostle. These Christians in the early Church had to fight unseen enemies, antagonists in the spirit--"spiritual hosts of evil in the heavenly warfare." The real enemy is entrenched in the unseen, and he is ever active, night and day, and the early believer confronted him in ancient Ephesus, as the later believer confronts him in modern New York and London.