In a small town there is a painter and decorator. Unknown to the locals, he thins down his paint, allowing him to charge low rates and therefore get lots of jobs around town. One such job is the local Methodist church. So he gets his brushes out and spends four days painting the outside of the church with his thinned-down paint, but on the last day, just as he is finishing, the heavens open and it rains cats and dogs, washing away all his hard work. God appears in the sky and, angry with his deception, says to the man:
“Repaint! Repaint! And never thin again!”