One of the most helpful and encouraging books that I have read on preaching is Preaching and Preachers by Martyn Lloyd-Jones (Click Here for more information). While the following quote is a bit longer than the other preaching quotes I have recently posted, it is well worth the 90 seconds it will take to read.
What is Preaching? Logic on fire! Eloquent reason! Are these contradictions? Of course they are not. Reason concerning this Truth ought to be mightily eloquent, as you see it in the case of the Apostle Paul and others. It is theology on fire. And a theology which does not take fire, I maintain, is a defective theology; or at least the man's understanding of it is defective. Preaching is theology coming through a man who is on fire. A true understanding and experience of the Truth must lead to this. . . A man who can speak about these things dispassionately has no right whatsoever to be in a pulpit; and should never be allowed to enter one.
What is the chief end of preaching? . . . To give men and women a sense of God and His presence. . . . I can forgive a man for a bad sermon, I can forgive the preacher almost anything if he gives me a sense of God, if he gives me something for my soul, if he gives me the sense that, though he is inadequate himself, he is handling something which is very great and very glorious, if he gives me some dim glimpse of the majesty and the glory of God, the love of Christ my Saviour, and the magnificence of the Gospel. If he does that I am his debtor, and I am profoundly grateful to him. Preaching is the most amazing, and the most thrilling activity that one can ever be engaged in, because of all that it holds out for all of us in the present, and because of the glorious endless possibilities in an eternal future.
David Martyn Lloyd-Jones, Preaching and Preachers (Grand Rapids, Mich: Zondervan, 1972) ,97-98.
(HT: Coty Pinckney)