Use All the Crayons in Your Box

What we put in words we must always supplement with images or illustrations. The word ‘illustrate’ means to illuminate, to throw light on a dark object, and this is what our sermon illustrations should do. People find it very difficult to handle abstract ideas; we need to convert them either into symbols (as in mathematics) or into pictures.”

Stott, The Challenge of Preaching, pp. 62-63