When the Apostle Paul visits the city of Troas, he preaches long into the night. Sitting on a windowsill is a young man by the name of Eutychus who falls asleep and then plunges to the ground, three stories below. Paul miraculously revives this young man, but the story does speak to the dangers of preaching:
Does a sermon keep the attention of the listeners?
What happens when you preach too long?
What is the purpose of the sermon?
Those questions are just as relevant today as they were two thousand years ago.