If you think about it, this is really a no-brainer. You’ve just spoken to a group for about 30 minutes — you’d naturally expect there to be at least some questions about what you just delivered. In fact, this seems to happen pretty much everywhere but at church.
Tim Keller writes that one of the key functions that his post-sermon Q&As serve is to invite skeptics and former Christians to ask questions that may help them examine the case for Christianity systematically. Keller writes:
[T]he Q&A was to some degree the beginning of a process of assimilation into the church. The non-Christians needed to get into a venue where they could more systematically explore the case for Christianity. The Christians needed to get to a place where they could be more systematically instructed and readied for church membership and other ways of participation in the body.
In other words, the Q&A serves not only as a forum for the Christians to ask questions that directly relate to the sermon just preached but as a open floor for evangelism for the pastor and the non-Christians to engage in. I think this is great. Now, let us (and our pastor friends) get busy with finding a good 40-minute-long block of time to follow their sermons.
Read in full here.