How the "substitute idea" is spreading is shown by the following incident which appears in an exchange: "Calling one day on a business man in his office, I found him, as usual, 'up to his eyes' in work. "'Sit down and wait a minute,' he said, handing me a chair. "'You are always working!' I exclaimed; 'how many hours do you put in each day?' "'Twenty-four,' he replied, with a smile. "My face expressed my astonishment. "'Yes,' he said, 'I work ten or twelve hours here; the rest of the time I am working at the other side of the world—by proxy, of course.' "'Let me explain,' he returned, more seriously than before. 'When I was at school I became deeply interested in the mission cause. I determined to go out to China to work in the field. "'But my father died, and his business here was in such a state that no outsider could successfully carry it on. "'There were a mother, sisters, and younger brothers dependent upon the profits of the house. I was obliged to remain here. But I determined, nevertheless, to have a representative in the field, and I took up the support of a native preacher in China.' "Here my friend took down a much-thumbed map of southern China, and pointed out a certain town. "'That is where my man is at work,' he said. 'We have representatives of our business in several of the principal cities of the world. I call this our missionary branch. My man there is working while I sleep. He is my substitute. "'In that way I work twenty-four hours a day—for the Master. I work here for the money to keep my representative working over there.'"—Selected.