R. Kent Hughes, in his introduction to the Preaching the Word Commentary of the Bible:
There are times when I am preaching that I have especially sensed the pleasure of God. I usually become aware of it through the unnatural silence. The ever-present coughing ceases and the pews stop creaking, bringing an almost physical quiet to the sanctuary– through which my words sail like arrows. I experience a heightened eloquence, so that the cadence and volume of my voice intensify the truth I am preaching.
There is nothing quite like it– the Holy Spirit filling one’s sails, the sense of his pleasure, and the awareness that something is happening among one’s hearers. This experience is, of course, not unique, for thousands of preachers have similar experiences, even greater ones.