Great sermons will have increases in intensity. Especially as you near the end of the sermon, the intensity of the sermon causes the people to really get involved in truth of the Gospel.
However, often preachers can miss the power of the increase in intensity by only using their vocal volume rather than allowing the content itself to hit the mark.
I call this “letting your content shout.” You probably have heard preachers preaching in a conversational tone and yet still the intensity of the truth of the gospel is about to explode. They aren’t necessarily yelling, and they aren’t jumping up and down, but they have found a way to let the material push the sermon forward.
Please note that I am not putting down vocal change or even vocal volume increase. I think this is necessary and needed. But, always allow the content to lead and let the content do some shouting in every sermon.