The sermon is human speech and divine communication.
The imperfections and limitations of the speakers bring us to understand that any fruit is due to the presence of the risen Christ who is the word.
…whereas our voices fail, crack under the strain and fade, ricochet off the walls of the church and die, the Word of the Lord endures forever. Our long, thin, bony fingers of sermons can point to the Messiah, but we can in no way replace Christ as substance and means of preaching. My voice barely reaches listeners on the second pew; God’s voice goes out into the whole world (Rom. 10:18). Nail Christ to the cross, seal him in the tomb, he will still have the last word when, “Look! God’s dwelling is here with humankind. He will dwell with them, and they will be his peoples. God himself will be their God” (Rev. 21:3).
Preachers Dare, Will Willimon, Abingdon Press, Nashville, 2020, pg 105.