"[O]ften there are spiritual reasons why a sermon doesn’t produce change. But there may also be practical reasons why a given sermon is ineffective."

Preaching

“Here are seven types of sermons that can render a preacher’s labors ineffective.” - TGC

Discussion

There is one who speaks rashly like the thrusts of a sword,
But the tongue of the wise brings healing.

(NASB, Proverbs 12:18)