1. First, there is the congregation, the assembly, the people who will hear the preaching. 2. Then there is the preacher (or preachers-it doesn't have to be only one.) 3.Then there is the sermon. 4. Finally, there is the presence of Christ.
Thomas G. Long, The Witness of Preaching, 2nd ed. (Louisville: Westminster John Knox, 2005), 15-16.