Speaking of faithful preachers, George Whitefield (1714-1770) stands out in my mind as one of the greatest examples. Besides being graciously blessed with hundreds of conversions under his ministry, what makes Whitefield impressive was his simplicity and earnestness wrapped together:
“Much of the wondrous power of that extraordinary man lay in his voice and action … [Think of the text of his sermons] delivered with an utterance appropriate to their nature; with an eye melting into tears; a voice tremulous with emotion, shrill yet full, now swelling into thunder, and then dying away in soft whispers; one moment apostrophizing God, and the next piercing the sinner’s conscience with an appeal that was as sharp arrows of the Almighty; at one time pouring out a stream of impassioned pity for the sinner, and the next moment a torrent of burning indignation against his sin; his very hands, and every gesture all the while seconding his matchless elocution and seeming to help his laboring soul; all this being not the trickery of an artificial rhetoric to catch applause, but only the expression of his burning desire to produce conviction in his hearers; not the acting of a man striving after popularity, but the spontaneous gushing forth of a heart agonizing for the salvation of immortal souls! What oratory must that have been which extorted from the skeptical and fastidious Hume the confession that it was worth going twenty miles to hear, which interested the infidel Bolingbroke, and warmed even the cold and cautious Franklin into enthusiasm? In those discourses which roused a slumbering nation from the torpor of lukewarmness, and breathed new life into its dying piety, you will find no profound speculation, no subtle reasoning, no metaphysical disquisition; for these never formed, and never can form, the staple of pulpit eloquence: but you will find ‘thoughts that breathe, and words that burn;’ and that when delivered with the magic of his wondrous voice, spoke, by the blessing of God, life into thousands dead in trespasses and sins.”
– John Angell James, An Earnest Ministry: The Want of the Times (Banner of Truth, 1847/1993) pp. 123-124.