of the kingdom cannot be understood without a grasp of what the debate over eschatology involves. The scholar most responsible for the conventional usage is Albert Schweitzer, whose entire career shows how difficult it can be to comprehend what Jesus said. Schweitzer’s lifework, whether in or out of print, was to understand the significance of the kingdom as Jesus taught it. He certainly did not invent the idea of “eschatology.” In 1894, while he was taking part in military training during the course