A preacher was called upon to substitute for the regular minister, who had failed to reach the church because he was delayed in a snowstorm. The speaker began by explaining the meaning of substitute.

"If you break a window," he said, "and then place cardboard there instead, that is a substitute."

After the sermon, a woman who had listened intently shook hands with him and wishing to compliment him actually said, "You were no substitute. You were a real pane."