Eventually the bishop decided to do a big restoration job on one of the biggest churches in the diocese. Jock put in a bid for the painting work and because his price was so competitive, he got the job.
And so he set to, erecting the trestles and putting up the planks, buying the paint and... yes, I am sorry to say, thinning it down with turpentine.
Three weeks later, Jock 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 thin paint from all over the church and knocking Jock right off the scaffold to land on the lawn.
Now, Jock was no fool. He knew this was a judgment from the Almighty, so he fell 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!"