I realize I began this blog for writers but every now and then I post something on here for communicators of different sorts. This might be for preachers, but I found it appropriate for writing as well.
A building without windows would be a prison rather than a house, for it would be quite dark, and no one would care to take it upon lease; and, in the same way, a discourse without a parable is prosy and dull, and involves a grievous weariness of the flesh… Our congregations hear us with pleasure when we give them a fair measure of imagery: when an anecdote is being told they rest, take breath, and give play to their imaginations, and thus prepare themselves for the sterner work which lies before them in listening to our profounder expositions.
Illustrate, by all means, but do not let the sermon be all illustrations, or it will be only suitable for an assembly of simpletons. A volume is all the better for engravings, but a scrap-book which is all woodcuts is usually intended for the use of little children. Our house should be built up with the substantial masonry of doctrine, upon the deep foundation of inspiration; its pillars should be of solid Scriptural argument, and every stone of truth should be carefully laid in its place; and then the windows should be ranged in due order, “three rows” if we will: “light against light,” like the house of the forest of Lebanon. But a house is not erected for the sake of windows, nor may a sermon be arranged with the view of fitting in a favourite apologue. A window is merely a convenience subordinate to the entire design, and so is the best illustration. ~C.H. Spurgeon, Lectures to My Students