“Of course Jesus preached a lot of monologue sermons, but I have noticed that Jesus did not usually preach sermons like nearly every church does today. He never seems to have, or at least rarely preached a sermon, or even a mini sermon, or parable without opportunity for discussion and questions afterwards. Possibly the ‘sermon on the mount’ is an exception as it is almost the length of a short sermon by todays standards without anyone else responding.
I have read in the past that the synagogue at the time of Christ had a time of interactive discussion after a speaker finished. In the New Testament we find arguably a provision made for ‘non clergy’ members to take turns in standing up and speaking (1 Cor 14:29). Furthermore as early churches were house churches I can’t imagine any speaker could then imagine that they could get away with an impersonal oratory followed by absolutely no discussion, debate or questions afterward. In Acts the gospel went out with much interaction. I also heard that martin Luther was famous for very gently and generously answering any question after a sermon.”