What kind of feedback from listeners tells Les that his Bible teaching is getting through?
Feedback such as letters and phone calls, especially written comments that a listener never before understood the difference between God dealing with Israel and the Church, confirms the teaching is getting through and being used to open Scripture to better understanding.
Les explains that he needs confirmation the Lord is using the teaching for His glory; otherwise, it would be money wasted from the listeners' end and theirs. He says that from letters and phone calls, they realize the Lord is using their teaching to open the Book to a better understanding. Nothing thrills him more than when someone writes and says, "I never before understood the difference between God dealing with Israel and the Church." That, he says, tells him something is coming through. He also expresses appreciation for listeners' letters and phone calls.