My father used to say, “A man can harvest a field with his bare hands. But his hands will become bloody and most of the grain will be lost before he can finish the task. You can give a man a sickle and he can harvest a field of grain in much less time. If you give him a combine, he can harvest the entire field in a single day.” This was the practical evangelism strategy that birthed the many “Tools for Evangelism” that we produce and give to those wiling to go into the vast harvest fields.