Here, at 8:39, in my opinion, is one of the more profound observations on film about the Catholic Church and History.  The evil that men do make many a blood stained page of History, but the Church survives throughout History as Caesars, Emperors, Kings, Prime Ministers, Presidents, Commissars, Fuhrers, Caudillos, Duces, General Secretaries, would be fake messiahs, etc,