"The quiet words of the wise are more to be heeded than the shouts of a ruler of fools." (Ecc. 9:17)
It is an odd delusion; here being the presupposition that good preaching requires loudness, manifest zeal, moving about, shaking, charisma etc... The congregation so quickly assumes that a preacher is speaking loudly because the Holy Spirit has come upon him.
But where does it say that the fruit of the Holy Spirit is a loud voice? Is it not rather gentleness and self-control?
It was said of Jonathan Edwards that he read his sermons from a paper and scarcely looked up to observe the audience. Hold up....this guy was a strategic figure in one of the Great Awakenings right? Where were the gesticulations in his homiletical presentations? Or what about meek and mild Lloyd-Jones? Do you believe he was frothing at the mouth and sounding out every word as if it were a pep rally?