Have you ever wondered why there isn't a question and answer session at the end of a sermon? Office presentations, conference lectures, scientific presentations, and pretty much any other formal talk will have a question and answer session at the end. The purpose is to give the audience a chance to clear up any confusion they might have had about the talk. But it's also because the speaker wants you to believe and go along with what they are talking about. If you disagree with something they've said for some reason, then they want an opportunity to address your doubts and give evidence to persuade you to the other side of the fence.
I know I have had questions about sermons I've heard. Some point wasn't clear or fleshed out enough. Or even just that I've disagreed with something the preacher has said. So, why don't preachers have question and answer sessions at the end? If I had the question, then isn't it possible that someone else had it too. Maybe the topic is something that everyone should hear. You would think they would want the chance to be more persuasive and dissolve our doubts. Just something to think about.