There was a painter called Scott, who was very interested in making a fast buck where he could; so he often would thin down paint to make it go a wee bit further.
As it happened, he got away with this for some time; but eventually the Presbyterian Church decided to do a big restoration job on the roof of one their biggest churches. Scott put in a bid and, because his price was so competitive, he got the job.
And so he set to, with a right good will, erecting the trestles, setting up the planks, buying the paint and, yes, I am sorry to say, thinning it down with the turpentine.
Well, Scott was up on the scaffolding, painting away, the job nearly done, when suddenly there was a horrendous clap of thunder, the sky opened and the rain poured down, washing the thinned out paint all over the church, and knocking Scott off the scaffold so far he was out on the lawn near the gravestones, surrounded by telltale puddles of the thinned and useless paint.
Scott the fool knew this was a judgment from the Almighty himself, so he got on his knees and cried: "Oh, God! Forgive me! What should I do?" And from the thunder, a mighty voice spoke:
"Repaint! Repaint, and thin no more!"