Occasionally someone will try something new, like run buses, visit the jail, go to a rest home, work with high school kids, or use voice broadcasting. Since we are called by God to win them no matter what the cost, the question is just how long should we keep trying? Do we quit preaching the day no one walks down the aisle? Do we quit running buses the day that the attendance is down? Do we quit soul-winning because there were no results? Do we stop voice broadcasting when the results seem lower than expected? The Bible has the answer in Isaiah: