“My cup runneth over” (Psalm 23:5).
A child rushes into the kitchen to tell his mother something going on in his life. He’s so excited he’s about to explode. His words gush out in torrents, the story appears in no particular order, and mom gets a tale she will remember forever but which the child could not reproduce in the same way for love or money.
Something similar happens when a pastor “preaches out of the overflow,” as we say.
He is so full of his subject, has so many great insights and stories and convictions and burdens to relate, and excitedly pours them out all over the congregation. No one is bored, no one goes to sleep, but some have a little trouble following his train of thought.
Granted, such a sermon is a vast improvement over the kind of dead monologue some ministers inflict on their dozing flocks, as though the sheep weren’t getting enough rest at home and needed a sedative. Given a choice, most of us would take the “explosion of joy” any day of the week.